Browse the Dictionary
- a ... abat–sons
- a battery ... abeyancy
- abfarad ... abnegate
- abnegation ... abranchiate
- abrase ... absolute humidity
- absolute idealism ... abuilding
- abukumalite ... acamprosate
- acana ... acceleration principle
- accelerative ... accite
- acclaim ... accretional
- accretionary hypothesis ... acerb
- acerbate ... acetylacetonate
- acetylacetone ... achomawi
- achondrite ... acidulate
- acidulated drop ... acorn cup
- acorn disease ... acrasin
- acrasis ... acrotarsial
- acrotarsium ... actinopod
- actinopoda ... actor
- actor–proof ... adamancy
- adam–and–eve ... addition product
- addition property ... adenylpyrophosphatase
- adenylpyrophosphate ... adirondack
- adirondack blackfly ... administrative assistant
- administrative county ... adpressed
- adpromission ... ad valorem
- advance ... advised
- advisee ... aeolid
- aeolididae ... aerogeography
- aerogeologist ... aesthetician
- aestheticism ... affidavit of verification
- affidavy ... afl–cio
- aflicker ... african oak
- africanoid ... afterimage
- afterimpression ... agalma
- agalmatolite ... age difference
- age discrimination ... aggress
- aggression ... agog
- agoge ... agriolimax
- agriology ... ahem
- ahepa ... aim
- aimable ... air–dry
- air duct ... air passage
- air philately ... airward
- air warden ... akepiro
- akeridae ... alángan
- alang grass ... albicore
- albigenses ... alcyone
- alcyones ... alert
- -ales ... algebra of classes
- algebra of relations ... alimentary
- alimentary canal ... alkanal
- alkane ... allegation
- allegator ... alligator fish
- alligator gar ... allonge
- allonym ... all–sliming
- all souls' day ... almondwood
- almondy ... alpha aurigae
- alphabet ... alpine dock
- alpine eyebright ... alterationist
- altercate ... alt–pop
- altrices ... alveolus
- alveon ... amaze
- amazeiner ... amblystoma
- ambocoelia ... american allspice
- american aloe ... americanistic
- americanite ... american vermilion
- american vessel ... amine
- amine oxidase ... ammonium chloride
- ammonium cyanate ... amount at risk
- amount limit ... amphigastrula
- amphigene ... ampulliform
- amputate ... anabas
- anabasis ... analgesia
- analgesic ... anaprotaspis
- anapsid ... anchor and collar
- anchorate ... andaman marble
- andaman padauk ... anele
- anelytrous ... angel pie
- angel red ... angle of torsion
- angle of view ... anguillulina
- anguimorpha ... anilino-
- anilo ... anishinabe
- anisian ... annie oakley
- annie over ... anodyne
- anodyne necklace ... ansarie
- ansate ... antelucan
- antemask ... anthocyanin
- anthocyathus ... anthropomorphize
- anthropomorphology ... anticipate
- anticipation ... antihistamine
- antihormonal ... anting
- antinial ... antirejection
- antiremonstrant ... antoeci
- antonian ... à outrance
- aoyama's fluid ... aphasia
- aphelandra ... apiose
- apiosoma ... apogon
- apogonid ... apostaxis
- aposteme ... appellation
- appellative ... apple–pie bed
- apple–polish ... apprize
- apprizement ... apteryges
- apterygial ... aquifer spring
- aquifoliaceae ... arak
- arāk ... arboreal
- arbored ... archaic smile
- archaism ... archigenesis
- archigetes ... arc of lowitz
- arc of meridian ... area
- area amniotica ... argentometer
- argentometric ... ariidae
- arikara ... armangite
- armarium ... army
- army ant ... array processor
- arrear ... arsed
- arsedine ... art historical
- art house ... artistry
- artist's proof ... asb
- asbestic ... ascribed
- ascription ... ash–throated flycatcher
- ashtoreth ... asparagus beetle
- asparagus broccoli ... asr
- asram ... asshole
- assi ... assumptious
- assumptive ... astite
- astm ... astrometeorologist
- astrometeorology ... atacameñan
- atacameño ... athetize
- athing ... atom beam
- atom bomb ... atsina
- atsugewi ... attitude gyro
- attitude of flight ... aucuba mosaic
- aud ... augment
- augmentation ... auricle
- auricula ... australian honeysuckle
- australian ironbark ... author
- author catalog ... autogenesis
- autogenetic ... automobiliana
- automobilism ... auto–tune
- autotype ... avaricious
- avarish ... aviophobia
- avirulence ... awning cloth
- awning deck ... axunge
- ay ... azteca
- aztec lily ... albright
- albuquerque, de ... aretino
- argall ... ad referendum
- à droite ... abay
- abbeville ... airdrie
- aire ... allegheny
- allegheny mountains ... anglia
- anglo–egyptian sudan ... arches national park
- arcos de la frontera ... athabasca, lake
- athens ... a growing belief that
- a hard/tough act to follow ... all present and correct
- all right already ... amount to the same thing
- a mug's game ... a poor second/third/fourth, etc.
- a pop ... a sharp tongue
- as hell ... as the need arises
- a stitch in time (saves nine) ... at/in full sail
- at intervals ... at the outside
- at the plate ... ax to grind
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