araca
Any of a number of Brazilian trees or the pear-like, apple-shaped guava fruits they bear: Psidium cattleyanum (syn. Psidium araca; (cherry guava, strawberry guava), or another Psidium (guava), or Mosiera guineensis (Brazilian guave), or Eugenia stipitata.

aracari
Any of a number of species of toucan in the genus Pteroglossus.

aracaris
plural of aracari

aracas
plural of araca

arboricities
plural of arboricity

arboricity
The minimum number of forests into which the edges of an undirected graph may be partitioned.

arcdegree
A unit of measurement of angle equal to ¹⁄₃₆₀ of a circle's circumference.

arcdegrees
plural of arcdegree

archipendulum
An ancient device used to measure angles, consisting of an A-shaped device with a plumbline attached to the top vertex and a mark on the midpoint of the crossbar.

arcminute
A unit of angle; 1/60 of a degree.

arcminutes
plural of arcminute

arcsec
Abbreviation of arcsecond.

arcsecond
A unit of angle; 1/60th of an arcminute, or 1/3600th of a degree.

arcseconds
plural of arcsecond

arcsecs
plural of arcsec

areometer
Any device used to measure the specific gravity of liquids or the density of solids.

areometers
plural of areometer

arithmancy
Divination using numbers that are the equivalent of letters of a name

arithmetics
plural of arithmetic

arithmogram
The number obtained by summing the numerical values of the letters of a word.

arithmograms
plural of arithmogram

arithmomancy
Alternative form of arithmancy.

arithmosophia
Alternative form of arithmosophy.

arithmosophy
A form of numerology that equates letters or words with numbers.

arithomancy
Alternative form of arithmancy.

arities
plural of arity

arity
The number of arguments or operands a function or operation takes. For a relation, the number of domains in the corresponding Cartesian product.
The maximum number of child nodes that any node in a given tree (data structure) may have.
the number of arguments (in Lojban grammar called sumti) specified in the definition of a selbri. (the selbri combined with the sumti make up a bridi).

armedness
The state or quality of having a particular type of or number of arms.

armful
The amount an arm or arms can hold.

armfull
Obsolete spelling of armful.

armfulls
plural of armfull

armfuls
plural of armful

armie
Obsolete spelling of army.

armies
plural of army

armsful
plural of armful

armsfull
plural of armfull

armsfuls
plural of armful
plural of armsful

armspan
Alternative form of arm span.

armspans
plural of armspan

army
A large, highly organized military force, concerned mainly with ground (rather than air or naval) operations.
A large, highly organized military force, concerned mainly with ground (rather than air or naval) operations.
A large, highly organized military force, concerned mainly with ground (rather than air or naval) operations.
The governmental agency in charge of a state's army.
A large group of people working toward the same purpose.
A large group of social animals working toward the same purpose.
Any multitude.
The military as a whole.

aromorphosis
The trend in evolution towards a greater amount of organization

aroura
Alternative form of arura.

arouras
plural of aroura

arpen
Alternative form of arpent (old unit of measure)

arpens
plural of arpen

arpent
A pre-metric French unit of length, having various official measures (from 58 to 72 metres).
A pre-metric French unit of area, having various official measures (from 3419 to 5107 square metres).

arpents
plural of arpent

arpine
Obsolete form of arpent.

arpines
plural of arpine

arrestance
A measure of the ability of a filter to remove dust from the air

arrestances
plural of arrestance

arroba
A traditional Spanish unit of mass, varying by time, location, and substance but generally around 11.5 kilograms.
A traditional Portuguese unit of mass, usually equivalent to 14.7 kilograms.
A traditional Spanish unit of liquid measure, varying by time, location, and substance but generally around 15 liters.

arrobas
plural of arroba

arroves
plural of arrove

arseload
a large amount.

arseloads
plural of arseload

artab
A dry measure, in ancient Egypt and Persia.

artaba
Alternative form of artab.

artabe
Alternative form of artab.

artabes
plural of artabe

artabs
plural of artab

artal
plural of rotl

arteriodactyl
Misspelling of artiodactyl.

artiodactyl
Any ungulate mammal with an even number of toes and belonging to the Artiodactyla, including pigs, sheep, deer, cattle, and most grazing animals. In contrast, horses have an odd number of toes and as such are not Artiodactyla, but Perissodactyla.

artiodactyle
Archaic spelling of artiodactyl.

artiodactyles
plural of artiodactyle

arura
An ancient measure of arable land, a square of 100 Egyptian cubits (mḥ) on each side.

aruras
plural of arura

arythmancy
Dated form of arithmancy.

ascococci
plural of ascococcus

ascococcus
A form of micrococcus, found in putrid meat infusions, occurring in peculiar masses, each of which is enclosed in a hyaline capsule and contains a large number of spherical micrococci.

asshair
The hair on an animal's or individual's buttocks.
A tiny amount; a whit; a jot.

asshairs
plural of asshair

assizer
An officer who has the care or inspection of weights and measures.
Alternative form of assizor.

assizers
plural of assizer

assload
An amount carried by an ass (donkey).
A large amount.
An amount carried up someone's ass.

assloads
plural of assload

asston
A large amount; an assload.

asstons
plural of asston

astatine
A highly radioactive chemical element (symbol At), one of the halogens, with atomic number 85.

astatines
plural of astatine

astroinformatics
The processing of large amounts of astronomical data

athodyd
A simple jet engine consisting essentially of a tube with a means of delivering fuel and ignition into the tube. The engine can only be started in a fast airflow. This type of engine is expected to be able to provide cruising speeds at Mach numbers of around 5 to 7 (5 to 7 times the speed of sound).

athodyds
plural of athodyd

atmo
The standard atmospheric pressure used in certain physical measurements and calculations; conventionally, that pressure under which the barometer stands at 760 millimeters, at a temperature of 0° Centigrade, at the level of the sea, and in the latitude of Paris.
Clipping of atmosphere

atmos
plural of atmo

atmoses
plural of atmos

atmosphere
The gases surrounding the Earth or any astronomical body.
The air in a particular place.
The conditions (such as music, illumination etc.) that can influence the mood felt in an environment.
The apparent mood felt in an environment.
A unit of measurement for pressure equal to 101325 Pa (symbol: atm), approximately the atmospheric pressure at sea level.
Extras in a scene who have no spoken lines.

atmospheres
plural of atmosphere

attoampere
An SI unit of electric current equal to 10⁻¹⁸ amperes. Symbol: aA

attoamperes
plural of attoampere

attobarn
A unit of surface area equal to 10⁻¹⁸ barns.

attobarns
plural of attobarn

attogram
An SI unit of mass equal to 10⁻¹⁸ grams. Symbol: ag

attogramme
Alternative spelling of attogram.

attogrammes
plural of attogramme

attograms
plural of attogram

attohertz
An SI unit of frequency equal to 10⁻¹⁸ hertz.

attojoule
An SI unit of energy, work, and heat equal to 10⁻¹⁸ joules. Symbol: aJ

attokatal
An SI unit of catalytic activity equal to 10⁻¹⁸ katals. Symbol: a

attokatals
plural of attokatal

attoliter
(metrology) An SI unit of fluid measure equal to 10⁻¹⁸ liters; alternative spelling of attolitre.

attoliters
plural of attoliter

attolitre
An SI unit of fluid measure equal to 10⁻¹⁸ litres; alternative spelling of attoliter.

attolitres
plural of attolitre

attometre
An SI unit of length equal to 10⁻¹⁸ metres. Symbol: am

attometres
plural of attometre

attoparsec
A unit of measure of 10⁻¹⁸ parsecs, or about 3.085 centimetres (1.215 inches).

attoparsecs
plural of attoparsec