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acerbic sharp, sour, or harsh in manner, tone, or the like. [2 definitions]
acerbity sharpness or severity of temper or manner. [2 definitions]
acetabulum the cup-shaped socket of the hipbone into which the top of the thighbone fits. [2 definitions]
acetal a colorless, flammable, volatile liquid compound used as a solvent, in perfumes and cosmetics, in organic synthesis, and to induce hypnosis. [2 definitions]
acetaldehyde a colorless, flammable, organic solvent.
acetamide a colorless water-soluble crystalline solid used esp. in forming organic compounds.
acetaminophen a drug used to relieve pain and reduce fever but which does not significantly reduce inflammation.
acetanilide a white crystalline organic powder produced by the effect of acetic acid on aniline and used to relieve pain and fever.
acetate a chemical compound derived from acetic acid. [2 definitions]
acetic pertaining to, containing, or producing vinegar or acetic acid.
acetic acid a clear, colorless, sour liquid compound that is the main ingredient in vinegar and is used in solvents, acetate fibers, plastics, and other products.
acetify to turn into or become vinegar or acetic acid.
aceto- pertaining to or containing acetic acid or acetyl.
acetone a chemical compound, highly volatile and flammable, used in making compounds and as a solvent, as in paints.
acetophenetidin a white powder or crystalline solid used to relieve fever and pain; phenacetin.
acetylcholine in biochemistry, the substance produced during nerve conduction that transmits nerve impulses across synapses and causes muscles to move. [2 definitions]
acetylene a highly flammable colorless gas used esp. to cut and weld metal and to give light.
acetylsalicylic acid aspirin.
acey-deucy a form of backgammon that assigns a special value to a throw of a one or a two.
Achaea an historic region of Greece along the northern coast of the Peloponnesus. [2 definitions]
Achaean of or pertaining to Achaea, a historic region of Greece along the northern coast of the Peloponnesus. [3 definitions]