<PAGE>

Exhibit 10.12
                                  APPENDIX A

                              GENERAL DEFINITIONS

     When used in the Loan and Security Agreement dated as of January 26, 2000,
by and between Fleet Capital Corporation and Moore Medical Corp., the following
terms shall have the following meanings (terms defined in the singular to have
the same meaning when used in the plural and vice versa):

          Account Debtor - any Person who is or may become obligated under or on
          --------------
     account of an Account.

          Accounts - all accounts, contract rights, chattel paper, instruments
          --------
     and documents, whether now owned or hereafter created or acquired by
     Borrower or in which Borrower now has or hereafter acquires any interest.

          Adjustment Date - the date which is seven (7) Business Days after the
          ---------------
     date on which a Compliance Certificate is delivered by the Borrower
     pursuant to subsection 7.1.3 hereof

          Affiliate - with respect to any Person, a Person (other than, with
          ---------
     respect to the Borrower, a Subsidiary of the Borrower): (i) which directly
     or indirectly through one or more intermediaries controls, or is controlled
     by, or is under common control with, such Person; (ii) which beneficially
     owns or holds 5% or more of any class of the Voting Stock of such Person;
     or (iii) 5% or more of the Voting Stock (or in the case of a Person which
     is not a corporation, 5% or more of the equity interest) of which is
     beneficially owned or held by such Person or a Subsidiary of a Person.

          Agreement - the Loan and Security Agreement referred to in the first
          ---------
     sentence of this Appendix A, all Exhibits thereto and this Appendix A.

          Applicable Margin - For each period commencing on an Adjustment Date
          -----------------
     through the date immediately preceding the next Adjustment Date (each a
     "Rate Adjustment Period"), the Applicable Margin with respect to each
     Revolving Credit Loan and with respect to the Unused Line Fee shall be the
     applicable percentage set forth below with respect thereto, based upon the
     Pricing Tier determined as set forth below with respect to the applicable
     Excess Availability during the fiscal quarter immediately preceding such
     Adjustment Date and the Leverage Ratio, determined on a Pro Forma Basis as
     of the end of the fiscal quarter of the Borrower immediately preceding such
     Adjustment Date:

<TABLE>
<CAPTION>
          --------------------------------------------------------------------------------------------
                    Pricing Tier                              Leverage Ratio
          --------------------------------------------------------------------------------------------
          <S>                               <C>               <C>                    <C>
                       Excess               ** 1.0:1          * 1.0:1 but **         * 1.5:1
                    Availability                              1.5:1
          --------------------------------------------------------------------------------------------
                     * $1.5MM                 Tier 1              Tier 1              Tier 2
          --------------------------------------------------------------------------------------------
                   * $1.0MM but
                     ** $1.5MM                Tier 1              Tier 2              Tier 3
          --------------------------------------------------------------------------------------------
                     ** $1.0MM                Tier 2              Tier 3              Tier 3
          --------------------------------------------------------------------------------------------
</TABLE>

*  (More than)
** (Less than or equal to)
<PAGE>

               The Applicable Margin associated with a Pricing Tier level is
               outlined in the following Grid:

<TABLE>
<CAPTION>
               -------------------------------------------------------------------------------------
                 Pricing Tier           Base Rate           LIBOR Portion       Unused Line Fee
                                         Portion                                    (p.a.)
               -------------------------------------------------------------------------------------
               <S>                      <C>                 <C>                 <C>
                       3                  1.00%.                 2.75%.              0.35%.
               -------------------------------------------------------------------------------------
                       2                  0.50%                  2.25%.              0.30%
               -------------------------------------------------------------------------------------
                       1                     0%.                 1.75%.              0.25%
               -------------------------------------------------------------------------------------
</TABLE>

          Notwithstanding the foregoing, (a) until the delivery of the
     Compliance Certificate for the fiscal period ending March 31, 2001, the
     Applicable Margin shall be the percentage corresponding to Pricing Tier 2
     in the table above, and (b) if the Borrower fails to deliver any Compliance
     Certificate when due pursuant to subsection 7.1.3 of the Agreement, then
     for the period commencing on the date such Compliance Certificate was due
     through the date such failure has been cured to Lender's satisfaction or
     waived by Lender, the Applicable Margin shall be that percentage
     corresponding to Level 3 in the table above.

          Availability - the amount of money which Borrower is entitled to
          ------------
     borrow from time to time as Revolving Credit Loans, such amount being the
     difference derived when the sum of the principal amount of Revolving Credit
     Loans then outstanding (including any amounts which Lender may have paid
     for the account of Borrower pursuant to any of the Loan Documents and which
     have not been reimbursed by Borrower), the LC Amount and the amount of any
     reserves is subtracted from the Borrowing Base.  If the sum of the amount
     outstanding, the LC Amount and any such reserves is equal to or greater
     than the Borrowing Base, Availability is 0.

          Bank - Fleet National Bank.
          ----

          Base Rate - the rate of interest announced or quoted by Bank from time
          ---------
     to time as its prime rate or base rate for commercial loans, whether or not
     such rate is the lowest rate charged by Bank to its most preferred
     borrowers; and, if such prime rate or base rate for commercial loans is
     discontinued by Bank as a standard, a comparable reference rate designated
     by Bank as a substitute therefor shall be the Base Rate.

          Base Rate Portion - that portion of the Revolving Credit Loans that is
          -----------------
     not subject to a LIBOR Option.

          Borrowing Base - as at any date of determination thereof, an amount
          --------------
     equal to the lesser of:

               (i)     Maximum Revolving Loan Amount; or

               (ii)    an amount equal to:

                       (1)    eighty percent (80%) of the net amount of Eligible
               Accounts outstanding at such date;

                                     PLUS

                       (2)    the lesser of (x) sixty-six and two-thirds percent
               (66 2/3%) of the Maximum Revolving Loan Amount as in effect on
               such date of determination and (y) sixty percent (60%) of the
               value of that portion of Eligible Inventory

                                      A-2
<PAGE>

               consisting of finished goods at such date, calculated on the
               basis of a weighted average cost basis to the extent such
               determination is permitted under GAAP, otherwise on the basis of
               the lower of cost or market with the cost calculated on a first-
               in, first-out basis;

                                     MINUS

                       (3)    the Reserve Amount.

          For the purposes hereof, the net amount of Eligible Accounts at any
     time shall be the face amount of such Eligible Accounts less any and all
     returns, rebates, discounts (which may, at Lender's option, be calculated
     on shortest terms), credits, allowances or excise taxes of any nature at
     any time issued, owing, claimed by Account Debtors, granted, outstanding or
     payable in connection with such Accounts at such time.  In the event of any
     material change in the value of any of the assets specified in the
     Borrowing Base, Lender may in the exercise of its reasonable judgement,
     after reasonable prior notice to Borrower, decrease from time to time the
     percentage advance rate related to any such asset in calculating the
     Borrowing Base.

          Business Day - (i) when used with respect to the LIBOR Option, shall
          ------------
     mean a day other than a Saturday or Sunday on which dealings may be
     effected in deposits of United States Dollars in the London interbank
     foreign currency deposits market and on which Lender is conducting and
     other banks may conduct business in London, England or in the State of
     Connecticut and (ii) when used with respect to any other provision of the
     Agreement, any day excluding Saturday, Sunday and any day which is a legal
     holiday under the laws of the State of Connecticut or is a day on which
     banking institutions located in such state are closed.

          Capital Expenditures - expenditures made or liabilities incurred for
          --------------------
     the acquisition of any fixed assets or improvements, replacements,
     substitutions or additions thereto which have a useful life or more than
     one year, including the total principal portion of Capitalized Lease
     Obligations.

          Capitalized Lease Obligation - any Indebtedness represented by
          ----------------------------
     obligations under a lease that is required to be capitalized for financial
     reporting purposes in accordance with GAAP.

          CERCLA - the Comprehensive Environmental Response, Compensation and
          ------
     Liability Act of 1980 as amended.

          Chattel Paper - as defined in the Code.
          -------------

          Closing Date - the date on which all of the conditions precedent in
          ------------
     Section 8 of the Agreement are satisfied and the initial Loans are made or
     the initial Letter of Credit or LC Guaranty is issued under the Agreement.

          Code - the Uniform Commercial Code as adopted and in force in the
          ----
     State of Connecticut, as from time to time in effect.

          Collateral - all of the Property and interests in Property described
          ----------
     in Section 5 of the Agreement, and all other Property and interests in
     Property that now or hereafter secure the payment and performance of any of
     the Obligations.

          Compliance Certificate - as defined in subsection 7.1.3 of the
          ----------------------
     Agreement.

                                      A-3
<PAGE>

          Consolidated - the consolidation in accordance with GAAP of the
          ------------
     accounts or other items as to which such term applies.

          Consolidated Net Loss - as defined in Schedule 7.3.
          ---------------------                 ------------

          Consolidated Tangible Net Worth - as defined in Schedule 7.3.
          -------------------------------                 ------------

          Current Assets - at any date means the amount at which all of the
          --------------
     current assets of a Person would be properly classified as current assets
     shown on a balance sheet at such date in accordance with GAAP.

          Default - an event or condition the occurrence of which would, with
          -------
     the lapse of time or the giving of notice, or both, become an Event of
     Default.

          Default Rate - as defined in subsection 2.1.2 of the Agreement.
          ------------

          Deposit Account - as defined in the Code.
          ---------------

          Distribution - in respect of any corporation or other entity means and
          ------------
     includes:  (i) the payment of any dividends or other distributions or
     return of capital on capital stock or other equity interests of such
     corporation or other entity (except distributions of the common stock of
     such corporation or other entity) and (ii) the redemption or acquisition of
     Securities of such corporation or other entity or of any rights, warrants
     or options to acquire any such Securities unless made contemporaneously
     from the net proceeds of the sale of Securities.

          Dominion Account - a special account of Lender established by Borrower
          ----------------
     pursuant to the Agreement at the Bank, and over which Lender shall have
     sole and exclusive access and control for withdrawal purposes.

          EBIT - as defined in Schedule 7.3.
          ----                 ------------

          Eligible Account - an Account arising in the ordinary course of
          ----------------
     Borrower's business from the sale of goods or rendition of services if:

               (i)    it does not arise out of a sale made by Borrower to a
          Subsidiary or an Affiliate of Borrower or to a Person controlling or
          controlled by an Affiliate of Borrower or a Subsidiary of Borrower.
          For the purposes of this definition "control" means the power to
          determine the management practices of the Person or to elect a
          majority of such Person's board of directors or persons performing
          similar functions;

               (ii)   it is an open account and it does not remain unpaid more
          than 60 days past its due date but in any event is not unpaid more
          than 150 days past the invoice date thereof;

               (iii)  50% or more of the Accounts from the Account Debtor are
          Eligible Accounts hereunder;

               (iv)   the total unpaid Accounts of the Account Debtor do not
          exceed 20% of the net amount of all Eligible Accounts (but only such
          excess shall not be Eligible Accounts solely due to this clause (iv));


                                      A-4
<PAGE>

               (v)     no covenant, representation or warranty contained in the
          Agreement with respect to such Account has been breached;

               (vi)    the Account Debtor is not also Borrower's creditor or
          supplier, and the Account Debtor has not disputed liability with
          respect to such Account (but only the disputed amount shall not be
          Eligible Accounts solely due to this clause (vi)), and the Account
          Debtor has not made any claim with respect to any other Account due
          from such Account Debtor, and the Account is not and may not otherwise
          become subject to any right of set-off by the Account Debtor;

               (vii)   the Account Debtor has not commenced a voluntary case
          under the federal bankruptcy laws, as now constituted or hereafter
          amended and has not made an assignment for the benefit of creditors,
          nor has a decree or order for relief has been entered by a court
          having jurisdiction in the premises in respect of the Account Debtor
          in an involuntary case under the federal bankruptcy laws, as now
          constituted or hereafter amended, nor has any other petition or other
          application for relief under the federal bankruptcy laws been filed
          against the Account Debtor, nor has the Account Debtor failed,
          suspended business, ceased to be Solvent, or consented to or suffered
          a receiver, trustee, liquidator or custodian to be appointed for it or
          for all or a significant portion of its assets or affairs;

               (viii)  it does not arise from a sale to an Account Debtor
          outside the fifty States of the United States of America or the United
          States territory of Guam, unless the sale is secured or guaranteed by
          an irrevocable letter of credit, guaranty or acceptance, in each case
          in form and substance acceptable to Lender in its discretion;

               (ix)    it does not arise from a sale to the Account Debtor on a
          bill-and-hold, guaranteed sale, sale-or-return, sale-on-approval,
          consignment or any other repurchase or return basis;

               (x)     the Account Debtor is not the United States of America or
          any department, agency or instrumentality thereof, unless Borrower has
          assigned its right to payment of such Account to Lender, in a manner
          satisfactory to Lender, so as to comply with the Assignment of Claims
          Act of 1940 (31 U.S.C. (S) 203 et seq., as amended);
                                         -- ---

               (xi)    it is at all times subject to Lender's duly perfected,
          first priority security interest and to no other Lien that is not a
          Permitted Lien;

               (xii)   the goods giving rise to such Account have been delivered
          to and accepted by the Account Debtor or the services giving rise to
          such Account have been performed by Borrower and accepted by the
          Account Debtor or the Account otherwise represents a final sale;

               (xiii)  the Account is not evidenced by chattel paper or an
          instrument of any kind and has not been reduced to judgment;

               (xiv)   Borrower has not made an agreement with the Account
          Debtor to extend the time of payment thereof beyond the time periods
          set forth in clause (ii) above; and

               (xv)    it is otherwise acceptable to the Lender in the Lender's
          discretion.

                                      A-5
<PAGE>

               It is understood that the conditions set forth in subsections
          (iii) and (vi) shall be deemed to be met at all times until such time
          as the Lender has received the cross-aging and aged credit reports in
          accordance with (S)7.1.17 and the Reserve Amount has been reduced by
          the Lender from $2,000,000 to $1,000,000.

          Eligible Inventory - such finished goods Inventory of Borrower as
          ------------------
     Lender, in its discretion, deems to be Eligible Inventory.  Without
     limiting the generality of the foregoing, no Inventory shall be Eligible
     Inventory unless:

               (i)    it is finished goods in good, new and saleable condition;

               (ii)   it is not slow-moving, obsolete or unmerchantable (taking
          into account the industry standard of Borrower's business;

               (iii)  it meets all standards imposed by any governmental agency
          or authority;

               (iv)   it conforms in all respect to any covenants, warranties
          and representations set forth in the Agreement;

               (v)    it is at all times subject to Lender's duly perfected,
          first priority security interest and no other Lien except a Permitted
          Lien;

               (vi)   it is situated at a location in compliance with the
          Agreement (including, without limitation, the Lender's receipt of a
          waiver from the lessor of any leased property in form and substance
          satisfactory to the Lender) in the United States and is not in
          transit; and

               (vii)  it is not samples or morgue goods (as determined in
          accordance with the Borrower's past practices consistently applied) or
          a product produced to a customer's specifications which are not
          covered by a purchase order.

          Environmental Laws - all federal, state and local laws, rules,
          ------------------
     regulations, ordinances, programs, permits, guidances, orders and consent
     decrees relating to health, safety and environmental matters, including
     without limitation the Resource Conservation and Recovery Act, CERCLA, the
     Superfund Amendments and Reauthorization Act of 1986, the Federal Clean
     Water Act, the Federal Clean Air Act, and the Toxic Substances Control Act.

          EPA - as defined in subsection 6.1.27.
          ---

          Equipment - all machinery, apparatus, equipment, fittings, furniture,
          ---------
     fixtures, motor vehicles and other tangible personal Property (other than
     Inventory) of every kind and description used in Borrower's and its
     Subsidiaries' operations or owned by Borrower or its Subsidiaries or in
     which Borrower or its Subsidiaries has an interest, whether now owned or
     hereafter acquired by Borrower or any of its Subsidiaries and wherever
     located, and all parts, accessories and special tools and all increases and
     accessions thereto and substitutions and replacements therefor.

          ERISA - the Employee Retirement Income Security Act of 1974, as
          -----
     amended, and all rules and regulations from time to time promulgated
     thereunder.

          Evans - Evans Pharmaceutical Corporation, an inactive corporation and
          -----
     wholly-owned Subsidiary of the Borrower.

                                      A-6
<PAGE>

          Event of Default - as defined in Section 9.1 of the Agreement.  As
          ----------------
     used in the Agreement, an Event of Default will be deemed to be continuing
     at all times after it occurs unless and until it is expressly waived in
     accordance with Section 9.4 of the Agreement.

          Excess Availability - with respect to any fiscal quarter of the
          -------------------
     Borrower, the amount by which (x) the Maximum Revolving Loan Amount exceeds
     (y) the average daily amount during such fiscal quarter of the sum of the
     LC Amount and the principal balance of the Revolving Credit Loans.

          Fixtures - as defined in the Code.
          --------

          GAAP - generally accepted accounting principles in the United States
          ----
     of America in effect from time to time.

          General Intangibles - all personal property of Borrower and its
          -------------------
     Subsidiaries (including things in action) other than goods, Accounts,
     chattel paper, Investment Property, documents, instruments and money,
     whether now owned or hereafter created or acquired by Borrower including,
     without limitation, all patents, patent applications, trademarks, trademark
     applications, trade names, copyrights and copyright applications.

          Guarantor - a Subsidiary (or former Subsidiary) of the Borrower that
          ---------
     shall have guaranteed the Obligations pursuant to a guaranty agreement in
     form and substance satisfactory to Lender.

          Guarantor/Lien Condition -with respect to any acquisition by the
          ------------------------
     Borrower or any of its Subsidiaries of a Person, the condition that (a) if
     the acquisition is an acquisition of all of the Voting Stock or equity
     interests of such other Person, such Person shall unconditionally become a
     Guarantor of all of the Obligations and shall grant first priority perfect
     Liens in all of its Property to secure such Guaranty and all of the
     Obligations, and (b) if the acquisition is an acquisition of less than all
     of the Voting Stock or equity interests of such other Person, the Borrower
     or such Subsidiary shall have granted to Lender a first priority perfected
     Lien on the Voting Stock or other  equity interests acquired by the
     Borrower or such Subsidiary and shall have used its reasonable best efforts
     to cause such Person to unconditionally become a Guarantor of all of the
     Obligations and to grant first priority perfected Liens in all of its
     Property to secure such Guaranty and the Obligations.

          Hazardous Substances - as defined in subsection 6.1.27.
          --------------------

          Indebtedness - as applied to a Person means, without duplication
          ------------

               (i)    all items which in accordance with GAAP would be included
          in determining total liabilities as shown on the liability side of a
          balance sheet of such Person as at the date as of which Indebtedness
          is to be determined, including, without limitation, Capitalized Lease
          Obligations,

               (ii)   all reimbursement obligations in connection with the
          letters of credit or letter of credit guaranties issued for the
          account of such Person,

               (iii)  every obligation of such Person under any forward
          contract, futures contract, swap, option or other financing agreement
          or arrangement (including, without limitation, caps, floors, collars
          and similar agreements), the value of which is dependent

                                      A-7
<PAGE>

          upon interest rates, currency exchange rates, commodities or other
          indices (a "derivative contract"),

               (iv)    every obligation in respect of Indebtedness of any other
          entity (including any partnership in which such Person is a general
          partner) to the extent that such Person is liable therefor as a result
          of such Person's ownership interest in or other relationship with such
          entity, except to the extent that the terms of such Indebtedness
          provide that such Person is not liable therefor and such terms are
          enforceable under applicable law

               (v)     every obligation of such Person (an "equity related
          purchase obligation") to purchase, redeem, retire or otherwise acquire
          for value any shares of capital stock of any class issued by such
          Person, any warrants, options or other rights to acquire any such
          shares, or any rights measured by the value of such shares, warrants,
          options or other rights,

               (vi)    every obligation, contingent or otherwise, of such Person
          guaranteeing, or having the economic effect of guarantying or
          otherwise acting as surety for, any obligation of a type described in
          any of clauses (i) through (v) (the "primary obligation") of another
          Person (the "primary obligor"), in any manner, whether directly or
          indirectly, and including, without limitation, any obligation of such
          Person (A) to purchase or pay (or advance or supply funds for the
          purchase of) any security for the payment of such primary obligation,
          (B) to purchase property, securities or services for the purpose of
          assuring the payment of such primary obligation, or (C) to maintain
          working capital, equity capital or other financial statement condition
          or liquidity of the primary obligor so as to enable the primary
          obligor to pay such primary obligation, and

               (vii)   in the case of Borrower (without duplication), the
          Obligations.

          The "amount" or "principal amount" of any Indebtedness at any time of
     determination represented by (w) any Indebtedness, issued at a price that
     is less than the principal amount at maturity thereof, shall be the amount
     of the liability in respect thereof determined in accordance with generally
     accepted accounting principles, (x) any Capitalized Lease shall be the
     principal component of the aggregate of the rentals obligation under such
     Capitalized Lease payable over the term thereof that is not subject to
     termination by the lessee, (y) any derivative contract shall be the maximum
     amount of any termination or loss payment required to be paid by such
     Person if such derivative contract were, at the time of determination, to
     be terminated by reason of any event of default or early termination event
     thereunder, whether or not such event of default or early termination event
     has in fact occurred and (z) any equity related purchase obligation shall
     be the maximum fixed redemption or purchase price thereof inclusive of any
     accrued and unpaid dividends to be comprised in such redemption or purchase
     price.

          Inventory - all of Borrower's inventory, whether now owned or
          ---------
     hereafter acquired including, but not limited to, all goods intended for
     sale or lease by Borrower, or for display or demonstration; all work in
     process; all raw materials and other materials and supplies of every nature
     and description used or which might be used in connection with the
     manufacture, printing, packing, shipping, advertising, selling, leasing or
     furnishing of such goods or otherwise used or consumed in Borrower's
     business; and all documents evidencing and General Intangibles relating to
     any of the foregoing, whether now owned or hereafter acquired by Borrower.

          Instruments - as defined in the Code.
          -----------

                                      A-8
<PAGE>

          Investment Property - as defined in the Code.
          -------------------

          LC Amount - at any time, the aggregate undrawn face amount of all
          ---------
     Letters of Credit and LC Guaranties for Letters of Credit then outstanding.

          LC Guaranty - any guaranty or reimbursement agreement pursuant to
          -----------
     which Lender or any Affiliate of Lender shall guaranty the payment or
     performance by Borrower of its reimbursement obligation under any Letter of
     Credit or shall agree to reimburse the issuer of such Letter of Credit for
     any drawings thereon.

          Legal Requirement - any requirement imposed upon Lender by any law of
          -----------------
     the United States of America or by any regulation, order, interpretation,
     rule or official directive (whether or not having the force of law) of the
     Federal Reserve Board, or any other board, central bank or governmental or
     administrative agency, institution or authority of the United States of
     America, or any political subdivision thereof.

          Letter of Credit - any letter of credit issued by Lender or Bank or
          ----------------
     any of Lender's Affiliates for the account of Borrower, including without
     limitation, the VA Letter of Credit.

          Leverage Ratio - as defined in Schedule 7.3.
          --------------                 ------------

          LIBOR Interest Payment Date with respect to any LIBOR Portion, the
     last day of each calendar quarter during the applicable LIBOR Period and
     the last day of the applicable LIBOR Period.

          LIBOR Option - the option granted pursuant to Section 2.3 of the
          ------------
     Agreement to have the interest on all or any portion of the principal
     amount of the Revolving Credit Loans based on a LIBOR Rate.

          LIBOR Period - any period of one month, two months or three months
          ------------
     commencing on a Business Day, selected as provided in Section 2.3(i);
     provided, however that no LIBOR Period shall extend beyond Revolving Credit
     Maturity Date.  If any LIBOR Period so selected shall end on a date that is
     not a Business Day, such LIBOR Period shall instead end on the next
     succeeding Business Day unless the result of such extension would be to
     carry such LIBOR Period into another calendar month, in which event such
     LIBOR Period shall end on the immediately preceding Business Day.  Any
     LIBOR Period relating to any LIBOR Portion that begins on the last Business
     Day of a calendar month (or on a day for which there is no numerically
     corresponding day in the calendar month at the end of such Interest Period)
     shall end on the last Business Day of a calendar month.  Each determination
     by Lender of the LIBOR Period shall, in the absence of manifest error, be
     conclusive.

          LIBOR Portion - that portion of the Revolving Credit Loans specified
          -------------
     in a LIBOR Request (including any portion of Revolving Credit Loans which
     is being borrowed by Borrower concurrently with such LIBOR Request) which
     is not less than $500,000 and is an integral multiple of $100,000, which
     does not exceed the outstanding balance of Revolving Credit Loans not
     already subject to a LIBOR Option and, which, as of the date of the LIBOR
     Request specifying such LIBOR Revolving Credit Portion, has met the
     conditions for basing interest on the LIBOR Rate in Section 2.3 of the
     Agreement and the LIBOR Period of which has commenced and not terminated.

                                      A-9
<PAGE>

          LIBOR Rate - with respect to any LIBOR Portion of the related LIBOR
          ----------
     Period, an interest rate per annum (rounded upwards, if necessary, to the
     next higher 1/16 of 1%) equal to the product of (i) the Base LIBOR Rate (as
     hereinafter defined) multiplied by (ii) Statutory Reserves.  For purposes
                          ----------
     of this definition, the term "Base LIBOR Rate" shall mean the rate (rounded
     upwards, if necessary, to the next higher 1/16 of 1%) at which deposits of
     U.S. dollars approximately equal in principal amounts to the LIBOR Portion
     specified in the applicable LIBOR Request are offered to Lender by prime
     banks in the London interbank foreign currency deposits market at
     approximately 11:00 a.m., London time, 2 Business Days prior to the
     commencement of such LIBOR Period, for delivery on the first day of such
     LIBOR Period.  Each determination by Lender of any LIBOR Rate shall, in the
     absence of manifest error, be conclusive.

          LIBOR Request - a notice in writing (or by telephone confirmed by
          -------------
     telex, telecopy or other facsimile transmission on the same day as the
     telephone request) from Borrower to Lender requesting that interest on a
     Revolving Credit Loan be based on the LIBOR Rate, specifying: (i) the first
     day of the LIBOR Period; (ii) the length of the LIBOR Period consistent
     with the definition of such term; and (iii) the dollar amount of the LIBOR
     Portion consistent with the definition of such term.

          Lien - any security interest or other interest in Property securing an
          ----
     obligation owed to, or a claim by, a Person other than the owner of a
     Property, whether such interest is based on common law, statute or
     contract.  The term "Lien" shall also include rights of seller under
     conditional sale contracts or title retention agreements, reservations,
     exceptions, encroachments, easements, rights-of-way, covenants, conditions,
     restrictions, leases and other title exceptions and encumbrances affecting
     Property.  For the purposes of the Agreement, Borrower shall be deemed to
     be the owner of any Property which it has acquired or holds subject to a
     conditional sale contract or title retention agreement or other arrangement
     pursuant to which title to the Property has been retained by or vested in
     some other Person for security purposes.

          Loan Account - the loan account established on the books of Lender
          ------------
     pursuant to Section 3.7 of the Agreement.

          Loan Documents - the Agreement, the Other Agreements and the Security
          --------------
     Documents, as the same may be modified and/or amended from time to time.

          Material Adverse Effect - (i) a material adverse effect on the
          -----------------------
     business, condition (financial or otherwise), operation, performance or
     Property of the Borrower or of Borrower and its Subsidiaries taken as a
     whole, (ii) a material adverse effect on the rights and remedies of Lender
     under the Loan Documents, or (iii) a material impairment of the ability of
     Borrower or any of its Subsidiaries to perform its obligations hereunder or
     under any Loan Document.

          Material Subsidiaries - means any Subsidiary of the Borrower that has
          ---------------------
     annual revenues of more than $5,000,000.

          Maximum Revolving Loan Amount - an amount equal to (i) $10,000,000,
          -----------------------------
     for the period commencing on the Closing Date through and including
     September 30, 2001, (ii) $12,500,000, for the period commencing on October
     1, 2001 through and including December 31, 2002 and (iii) $15,000,000, for
     the period commencing on January 1, 2003 through the Revolving Credit
     Maturity Date.

                                      A-10
<PAGE>

          Merginet Debt - Indebtedness of the Borrower in favor of Richard
          -------------
     Bilger pursuant to the Asset Purchase Agreement by and between the Borrower
     and Richard Bilger, individually and d/b/a Merginet Medical Resources dated
     as of July 14, 2000, which Indebtedness is characterized as earn-out
     payments under such agreement, as such agreement is in effect on the date
     thereof and without giving effect to any amendments subsequent thereto.

          Money Borrowed - means, with respect to Borrower (i) Indebtedness
          --------------
     arising from the lending of money by any Person to Borrower or any
     Subsidiary of Borrower; (ii) Indebtedness, whether or not in any such case
     arising from the lending by any Person of money to Borrower or a Subsidiary
     of Borrower, (1) which is represented by notes payable or drafts accepted
     that evidence extensions of credit to Borrower or a Subsidiary of Borrower,
     (2) which constitutes obligations evidenced by bonds, debentures, notes or
     similar instruments executed by Borrower or a Subsidiary of Borrower, (3)
     upon which interest charges are customarily paid (other than accounts
     payable) or that was issued or assumed by Borrower or a Subsidiary of
     Borrower as full or partial payment for Property, or (4) which is secured
     in whole or in part by a Lien on any Property of Borrower or any Subsidiary
     of Borrower; (iii) Indebtedness that constitutes a Capitalized Lease
     Obligation of Borrower or a Subsidiary of Borrower; (iv) reimbursement
     obligations of Borrower or any Subsidiary of Borrower with respect to
     letters of credit or guaranties of letters of credit, and (v) Indebtedness
     of the Borrower or any Subsidiary under clause (vi) of the definition of
     Indebtedness with respect to any other Indebtedness that would be Money
     Borrowed if it were owed directly by Borrower or any Subsidiary of
     Borrower.

          Multiemployer Plan - has the meaning set forth in Section 4001(a)(3)
          ------------------
     of ERISA.

          Obligations - all Loans, the outstanding amount of all LC Guaranties
          -----------
     and all other advances, debts, liabilities, obligations (including, without
     limitation, reimbursement obligations), covenants and duties, together with
     all interest, fees and other charges thereon, owing, arising, due or
     payable from Borrower to Lender or any of its Affiliates (including,
     without limitation, the Bank) of any kind or nature, present or future,
     whether or not evidenced by any note, guaranty or other instrument, whether
     arising under the Agreement, any of the other Loan Documents or pursuant to
     any interest rate protection arrangements or otherwise whether direct or
     indirect (including those acquired by assignment), absolute or contingent,
     primary or secondary, due or to become due, now existing or hereafter
     arising and however acquired.

          Other Agreements - any and all agreements, instruments and documents
          ----------------
     (other than the Agreement and the Security Documents), heretofore, now or
     hereafter executed by Borrower or any Subsidiary of Borrower and delivered
     to Lender or any of its Affiliates (including, without limitation, the
     Bank) in respect of the transactions contemplated by the Agreement.

          Participating Lender - each Person who shall be granted the right by
          --------------------
     Lender to participate in any of the Loans described in the Agreement and
     who shall have entered into a participation agreement in form and substance
     satisfactory to Lender.

          Perfection Certificate - the Perfection Certificate executed by
          ----------------------
     Borrower on or about the Closing Date in favor of Lender.

          Permitted Acquisition - an acquisition by the Borrower or any of its
          ---------------------
     Subsidiaries (other than Evans or WW Supply) of (a) other Persons which at
     the time of such acquisition satisfy the Guarantor/Lien Condition, or (b)
     divisions or business segments of other Persons (whether by way of purchase
     of assets or capital stock, merger or otherwise), but no such acquisition
     referred to in clause (a) or (b) shall be a Permitted Acquisition unless:

                                      A-11
<PAGE>

          (i)    when added to all prior Permitted Acquisitions during the
     twelve month period ending on the date of such acquisition, (x) no more
     than four Permitted Acquisitions shall have occurred during such twelve
     month period, (y) the aggregate purchase price for the proposed acquisition
     and all such other acquisitions during such twelve month period shall not
     exceed $4,000,000, except for amounts payable in common stock of Borrower
     or by promissory note which is subordinated to the Obligations by a
     subordination agreement in form and substance satisfactory to the Lender,
     and (z) the amount of such Subordinated Debt shall not exceed $5,000,000 at
     any time (exclusive of the Podiatry Online Subordinated Debt);

          (ii)   the acquired Person, division or business is engaged primarily
     in the same, related or complementary business as the Borrower and its
     Subsidiaries, the structure of the acquisition and the documentation
     evidencing such acquisition and the rights and obligations of the Borrower
     and its Subsidiaries with respect thereto shall be reasonably acceptable to
     the Lender and, with respect to acquisitions of equity interests, the
     Borrower or a Wholly-Owned Subsidiary of the Borrower shall own, directly
     or indirectly, at least 51% of the Voting Stock and 51% of the equity
     interests of the acquired Person, division or business (except that
     Borrower or such Wholly-Owned Subsidiary may own less than 51% of the
     Voting Stock and less than 51% of the equity of the acquired Person,
     division or business so long as such acquisition does not result in the
     Borrower and its Subsidiaries having acquired less than 51% of the Voting
     Stock or less than 51% of the equity interest of more than two of the
     Persons, divisions and businesses acquired during the twelve month period
     ending on the date of such acquisition;

          (iii)  with respect to acquisitions under subsection (b) above, the
     Borrower or such Subsidiary which is acquiring such Property grants the
     Lender first priority perfected Liens in all such acquired Property to
     secure the Obligations;

          (iv)   the acquisition shall be approved by the Board of Directors (or
     Persons performing similar functions) of the acquired Person;

          (v)    Borrower shall have provided to the Lender updated annual
     Projections satisfactory to the Lender which give effect to the proposed
     acquisition; and

          (vi)   no Default or Event of Default shall exist at the time of or
     after giving effect to the acquisition; for the purpose of determining
     whether a Default will exist after giving effect to the acquisition, each
     of the financial covenants will be tested on a proforma basis after giving
     effect to the acquisition, with such adjustments to Borrower's Indebtedness
     and EBIT as are acceptable to the Lender.

          Permitted Liens - any Lien of a kind specified in clauses (i) through
          ---------------
     (xii) of subsection 7.2.5 of the Agreement.

          Permitted Officer Indebtedness - any Indebtedness of an officer or
          ------------------------------
     director of the Borrower in favor of Borrower in an aggregate amount not to
     exceed the principal amount of promissory notes received by the Borrower as
     consideration for the issuance or transfer of not more than 200,000 shares
     in the aggregate of Borrower's capital stock to such officer or director.

          Permitted Purchase Money Indebtedness - Purchase Money Indebtedness of
          -------------------------------------
     Borrower incurred after the date hereof which is secured by a Purchase
     Money Lien and which, when aggregated with the principal amount of all
     other such Purchase Money Indebtedness and Capitalized Lease Obligations of
     Borrower at the time outstanding, does not exceed One Million and 00/100
     Dollars ($1,000,000).  For the purposes of this definition, the principal
     amount of any

                                      A-12
<PAGE>

     Purchase Money Indebtedness consisting of capitalized leases shall be
     computed as a Capitalized Lease Obligation.

          Person - an individual, partnership, corporation, limited liability
          ------
     company, joint stock company, land trust, business trust, unincorporated
     organization or other entity, or a government or agency or political
     subdivision thereof.

          Plan - an employee benefit plan now or hereafter maintained for
          ----
     employees of Borrower that is covered by Title IV of ERISA.

          Podiatry Online - Podiatry Online, Inc., a Florida corporation.
          ---------------

          Podiatry Online Subordinated Debt - Subordinated Debt of Podiatry
          ---------------------------------
     Online in favor of Alan Sherman and Michael Shore dated July 15, 2000 in
     the aggregate original principal amount of $750,000.

          Pro Forma Basis - as defined in Schedule 7.3.
          ---------------                 ------------

          Projections - Borrower's forecasted Consolidated and consolidating (i)
          -----------
     balance sheets, (ii) profit and loss statements, (iii) cash flow
     statements, (iv) capitalization statements and (v) Borrowing Base to
     Revolving Credit Loan projections, all prepared on a consistent basis with
     Borrower's historical financial statements, together with appropriate
     supporting details and a statement of underlying assumptions.

          Property - any interest in any kind of property or asset, whether
          --------
     real, personal or mixed, tangible or intangible.

          Purchase Money Indebtedness - means and includes (i) Indebtedness
          ---------------------------
     (other than the Obligations) for the payments of all or any part of the
     purchase price of any fixed assets, (ii) any Indebtedness (other than the
     Obligations) incurred at the time of or within 10 days prior to or after
     the acquisition of any fixed assets for the purpose of financing all or any
     part of the purchase price thereof, and (iii) any renewals, extensions or
     refinancings thereof, but not any increases in the principal amounts
     thereof outstanding at the time of any such renewal, extension or
     refinancing.

          Purchase Money Lien - a Lien upon fixed assets which secures Purchase
          -------------------
     Money Indebtedness, but only if such Lien shall at all times be confined
     solely to the fixed assets (and insurance on such fixed assets) the
     purchase price of which was financed through the incurrence of the Purchase
     Money Indebtedness secured by such Lien.

          Rentals - as defined in subsection 7.2.12 of the Agreement.
          -------

          Reportable Event - any of the events set forth in Section 4043(b) of
          ----------------
     ERISA.

          Reserves - as defined in subsection 1.1.1 of the Agreement.
          --------

          Reserve Amount - Prior to the Lender's notifying the Borrower in
          --------------
     writing that the Lender, in the Lender's discretion, has determined that
     the Borrower can provide the Lender with cross-aging and aged credit
     reports in form and detail satisfactory to the Lender, $2,000,000;
     thereafter, $1,000,000.

                                      A-13
<PAGE>

          Restricted Investment - any investment made in cash or by delivery of
          ---------------------
     Property to any Person whether by acquisition of stock, Indebtedness or
     other obligation or Security, or by loan, advance or capital contribution,
     or otherwise, or in any Property except the following:

               (i)    investment, to the extent existing on the Closing Date, in
          one or more Subsidiaries of Borrower (other than Evans and WW Supply);

               (ii)   Property to be used by Borrower in the ordinary course of
          business;

               (iii)  Current Assets arising from the sale of goods and services
          in the ordinary course of business of Borrower and its Subsidiaries;

               (iv)   investments in direct obligations of the United States of
          America, or any agency thereof or obligations guaranteed by the United
          States of America, provided that such obligations mature within one
                             --------
          year from the date of acquisition thereof;

               (v)    investments in certificates of deposit maturing within one
          year from the date of acquisition issued by a bank or trust company
          organized under the laws of the United States or any state thereof
          having capital surplus and undivided profits aggregating at least
          $100,000,000;

               (vi)   Permitted Acquisitions;

               (vii)  investments in commercial paper given the highest rating
          by a national credit rating agency and maturing not more than 270 days
          from the date of creation thereof; and

               (viii) the Permitted Officer Indebtedness.

          Revolving Credit Loan - a loan made by Lender as provided in Section
          ---------------------
     1.1 of the Agreement or any other provision of the Agreement pursuant to
     which a loan is made or deemed to have been made to Borrower.

          Revolving Credit Loan Overadvance - the amount, if any, by which the
          ---------------------------------
     sum of the outstanding principal amount of Revolving Credit Loans plus the
                                                                       ----
     LC Amount exceeds the Borrowing Base.

          Revolving Credit Maturity Date - January 26, 2004.
          ------------------------------

          Revolving Credit Note - the Revolving Credit Note to be executed by
          ---------------------
     Borrower on or about the Closing Date in favor of Lender to evidence the
     Revolving Credit Loans, which shall be in the form of Exhibit A to the
                                                           ---------
     Agreement.

          Security - shall have the same meaning as in Section 2(1) of the
          --------
     Securities Act of 1933, as amended.

          Security Documents - The Trademark Security Agreement, the Stock
          ------------------
     Pledge Agreement and all other instruments and agreements now or at any
     time hereafter securing the whole or any part of the Obligations.

                                      A-14
<PAGE>

          Settlement Agreement - the Settlement Agreement dated on or about the
          --------------------
     Closing Date by and among the United States Department of Justice, the
     Borrower and Jayne Sieg, a copy of which has been provided to the Lender.

          Solvent - as to any Person, such Person (i) owns Property whose fair
          -------
     saleable value is greater than the amount required to pay all of such
     Person's Indebtedness (including contingent debts), (ii) is able to pay all
     of its Indebtedness as such Indebtedness matures and (iii) has capital
     sufficient to carry on its business and transactions and all business and
     transactions in which it is about to engage.

          Statutory Reserves - a fraction (expressed as a decimal) the numerator
          ------------------
     of which is the number one, and the denominator of which is the number one
     minus the aggregate of the maximum reserve percentages (including, without
     limitation, any marginal, special emergency or supplemental reserves), if
     any, expressed as a decimal, established by the Board of Governors of the
     Federal Reserve System and any other banking authority to which Lender is
     subject for Eurocurrency Liabilities (as defined in Regulation D of the
     Board of Governors of the Federal Reserve System or any successor thereto).
     Such reserve percentages shall include, without limitation, those imposed
     under such Regulation D.  LIBOR Portions shall be deemed to constitute
     Eurocurrency Liabilities and as such shall be deemed to be subject to such
     reserve requirements without benefit of or credit for proration, exceptions
     or offsets which may be available from time to time to Lender under such
     Regulation D.  Statutory Reserves shall be adjusted automatically on and as
     of the effective date of any change in any reserve percentage.

          Stock Pledge Agreement - the Stock Pledge Agreement executed by
          ----------------------
     Borrower on or about the Closing Date in favor of Lender, as such Stock
     Pledge Agreement has been or will be amended from time to time.

          Subordinated Debt - unsecured Indebtedness of the Borrower or any of
          -----------------
     its Subsidiaries that is expressly subordinated and made junior to the
     payment and performance in full of the Obligations, and evidenced as such
     by a subordination agreement or by another written instrument containing
     subordination provisions in form and substance approved by the Lender in
     writing, including, without limitation, the VA Debt.

          Subsidiary - with respect to any Person, any corporation, association,
          ----------
     trust, limited liability company, or business entity of which such Person
     owns, directly or indirectly through one or more intermediaries, more than
     50% of the Voting Stock and other equity interests at the time of
     determination.

          Tax - in relation to any LIBOR Portion and the applicable LIBOR Rate,
          ---
     any tax, levy, impost, duty, deduction, withholder or charges of whatever
     nature required by any Legal Requirement (i) to be paid by Lender and/or
     (ii) to be withheld or deducted from any payment otherwise required hereby
     to be made by Borrower to Lender; provided, that the term "Tax" shall not
                                       --------
     include any taxes imposed upon the net income of Lender.

          Term - as defined in Section 4.1 of the Agreement.
          ----

          Trademark Security Agreement - the Trademark Collateral Security and
          ----------------------------
     Pledge Agreement executed by Borrower on or about the Closing Date in favor
     of Lender, as such Trademark Collateral Security and Pledge Agreement has
     been or will be amended from time to time.

                                      A-15
<PAGE>

          Uniform Customs- with respect to (i) any documentary Letter of Credit,
          ---------------
     the Uniform Customs and Practice for Documentary Credits (1993 Revision),
     International Chamber of Commerce Publication No. 500 or any successor
     version thereto adopted by the Lender or Bank, as applicable, in the
     ordinary course of its business as a letter of credit issuer and in effect
     at the time of issuance of such Letter of Credit and (ii) any standby
     Letter of Credit, the International Standby Practices promulgated by the
     Institute of International Banking Law and Practice, Inc. or any successor
     version thereto adopted by the Lender or Bank, as applicable, in the
     ordinary course of its business as a letter of credit issuer and in effect
     at the time of issuance of such Letter of Credit.

          Unused Line Fee - as defined in Section 2.6 of the Agreement.
          ---------------

          VA Debt - Indebtedness of the Borrower to the United States of America
          -------
     as evidenced by that certain Promissory Note dated on or about the Closing
     Date in the original principal amount of $5,200,000.

          VA Letter of Credit - The Letter of Credit issued by the Bank for the
          -------------------
     benefit of the United States of America at the request of the Borrower in
     connection with the VA Debt, as to which the maximum amount that may be
     drawn thereon does not exceed $3,000,000, as such amount shall be reduced
     from time to time as the result of payments by the Borrower on the VA Debt.

          Voting Stock - Securities of any class or classes of a corporation,
          ------------
     association, trust, limited liability company or other business entity the
     holders of which are ordinarily, in the absence of contingencies, entitled
     to elect a majority of directors (or Persons performing similar functions).

          Wholly-Owned Subsidiary -a Subsidiary as to which all of its
          -----------------------
     outstanding Voting Stock and equity interests are directly, or indirectly
     through one or more intermediaries, owned by the Borrower or a Wholly-Owned
     Subsidiary of the Borrower.

          WW Supply - W.W. Supply Corporation, an inactive corporation and
          ---------
     wholly-owned Subsidiary of the Borrower.

          Other Terms.  All other terms contained in the Agreement shall have,
          -----------
     when the context so indicates, the meanings provided for by the Code to the
     extent the same are used or defined therein.

          Certain Matters of Construction.  The terms "herein," "hereof" and
          -------------------------------
"hereunder" and other words of similar import refer to the Agreement as a whole
and not to any particular section, paragraph or subdivision.  Any pronoun used
shall be deemed to cover all genders.  The section titles, table of contents and
list of exhibits appear as a matter of convenience only and shall not affect the
interpretation of the Agreement.  All references to statutes and related
regulations shall include any amendments of same and any successor statutes and
regulations.  All references to any of the Loan Documents shall include any and
all modifications thereto and any and all extensions or renewals thereof.

                                      A-16