Subtraction
* concept that many children have difficulty with.
* is arithmetic operations
  - decrease
  - just one form of arithmetic
  - neither commutative nor associative
  - opposite of addition
* is the inverse of addition and division is the inverse of multiplication
* is the opposite of addition, as division is the opposite of multiplication
  - division is the inverse of multiplication, and so on
  - usually the second of the basic mathematical functions learned
  - very similar to addition except it subtracts the numbers
* means to take away part of or all of a group.

Shopping
*  compare prices.
* are buying
  - commodities
  - tirings
  - used for fun
* cause a desire to buys
  - bankruptcies
  - callus
  - debts
  - less money
  - panic
* favourite pastime for most people.
* form of patriotism.
* is an activity that can be performed for either utilitarian or hedonic motives
  - for comparing price,quality and value
  - life, leisure, and the pursuit of happiness with a credit card
  - many people's favorite indoor sport
  - often around or with other people
  - one of many ways to surround children with meaningful talk
* is the area in which privacy is still largely unprotected
  - chief sacrament of consumerist culture
  - national pastime in Singapore, next to eating
* quest for meaning and personal identity.
* social activity.
* way of life.

Soft tofu
* good choice for recipes that use blended tofu or silken tofu.
* is good for recipes that call for blended tofu
  - use in recipes that use blended tofu, or soups
  - in recipes calling for blended tofu

Stasis
* is death
  - inaction
  - pathology
  - the antithesis of evolution
* sets in when the available ecological niches are filled by existing species.
* time of limited change in a lineage.

Smiling
* are good.
* cause happiness.

Solar urticaria
* develops at a site of sun exposure within a few minutes.
* follows exposure to the sun or a sun lamp.
* rare reaction to sun or UV exposure.

Selenium tetrachloride
* yellow or white solid.
+ Selenium tetrachloride, Properties: Selenium compounds :: Chlorine compounds
  * Selenium tetrachloride is a yellow or white solid. It evaporates easily. It reacts with water to make hydrochloric acid and selenous acid. It reacts with selenium dioxide to make selenium oxychloride, a mixture of selenium dioxide and selenium tetrachloride bonded together.

Superannuation
* is an accumulation investment specifically targeted at providing for retirement
  - designed as a long-term investment to save towards retirement
  - dismissals
* pension fund to which employees and employers make regular payments.

Spunk
* is courage
  - so prevalent in anime because it is usually so appealing
* library of anarchist literature on internet.

Syncopation
* is as common in jazz as improvisation
  - music
  - rhythms
  - the pulse of jazz and improvisation is often described as the life-blood of jazz
  - when there's a note or tap on the off beat
* occurs when the normal rhythmic stresses in a bar are changed.
* results when stress is placed on weak beats rather than on strong beats.
* rhythm in which an accent is placed on a normally weak beat.
* takes place when an accent is misplaced, i.e., placed on an unaccented beat.