Words starting with A that are validated

• Arthur Compton — Noun – English ～ United States physicist noted for research on x-rays and gamma rays and nuclear energy; his observation that X-rays behave like miniature bowling balls in their interactions with electrons provided evidence for the quantal nature of light (1892-1962)
• analogue computer — Noun – English ～ a computer that represents information by variable quantities (e.g., positions or voltages)
• analog computer — Noun – English ～ a computer that represents information by variable quantities (e.g., positions or voltages)
• Anthony Comstock — Noun – English ～ United States reformer who led moral crusades against art and literature that he considered obscene (1844-1915)
• Auguste Comte — Noun – English ～ French philosopher remembered as the founder of positivism; he also established sociology as a systematic field of study
• Abies concolor — Noun – English ～ medium to tall fir of central to western United States having a narrow erect crown and soft wood
• Abbe condenser — Noun – English ～ a condenser having 2 or 3 lenses with wide aperture for use in microscopes
• air-condition — Verb – English ～ equip with an apparatus for controlling the humidity and temperature; "Our house is not air-conditioned"
• air-condition — Verb – English ～ control the humidity and temperature of; "The room was cool because it had been air-conditioned"
• atmospheric condition — Noun – English ～ the atmospheric conditions that comprise the state of the atmosphere in terms of temperature and wind and clouds and precipitation; "they were hoping for good weather"; "every day we have weather conditions and yesterday was no exception"; "the conditions were too rainy for playing in the snow"
• air-conditioned — Adjective – English ～ cooled by air conditioning
• air-conditioner — Noun – English ～ an appliance designed to extract humidity from the air and thereby cool it; "we rarely turn on the air-conditioner"
• air conditioner — Noun – English ～ a system that keeps air cool and dry
• air conditioner — Noun – English ～ an appliance designed to extract humidity from the air and thereby cool it; "we rarely turn on the air-conditioner"
• air conditioning — Noun – English ～ a system that keeps air cool and dry
• aversive conditioning — Noun – English ～ conditioning to avoid an aversive stimulus
• Andean condor — Noun – English ～ large vulture of the high Andes having black plumage and white neck ruff
• alluvial cone — Noun – English ～ a fan-shaped deposit where a fast flowing stream flattens out
• Augsburg Confession — Noun – English ～ the document drawn up in 1555 to defend the catholicity of Lutheran doctrine and to justify innovations in Lutheran practice; is still in effect today
• Afropavo congensis — Noun – English ～ both sexes are brightly colored

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