acid

¹ac·id

adj \ˈa-səd\

Definition of ACID

1

a : sour, sharp, or biting to the taste <an acid flavor> b : sharp, biting, or sour in manner, disposition, or nature <an acid individual> <an acid personality> c : sharply clear, discerning, or pointed <an acid wit> <acid criticism> d : piercingly intense and often jarring <acid yellow>

2

a : of, relating to, or being an acid; also : having the reactions or characteristics of an acid <acid soil> <an acid solution> b of salts and esters : derived by partial exchange of replaceable hydrogen <acid sodium carbonate NaHCO₃> c : containing or involving the use of an acid (as in manufacture) <an acid bath> d : marked by or resulting from an abnormally high concentration of acid <acid indigestion>

3

: relating to or made by a process (as in making steel) in which the furnace is lined with acidic material and an acidic slag is used

4

: rich in silica <acid rocks>

— ac·id·ly adverb

— ac·id·ness noun

Examples of ACID

1. He washes his windows with an acid solution of vinegar and water.
2. <with her acid personality, my aunt could be relied upon to bring some much-needed balance to the holiday gush>

Origin of ACID

French or Latin; French acide, from Latin acidus, from acēre to be sour — more at acet-

First Known Use: 1626

Related to ACID

Synonyms: sour, acidic, acidulous, sourish, tart, tartish, vinegary

Antonyms: amiable, good-humored, good-natured, good-tempered

Related Words: dry, soured, unsweetened; pungent, sharp, tangy, zestful, zesty, zingy; astringent, puckery hyperacid

Near Antonyms: sweet; bland, smooth; flat, flavorless, insipid, savorless, tasteless, zestless; dilute, thin, watery, weak

see all synonyms and antonyms

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Other Chemical Engineering Terms

alkali, cation, decant, hygroscopic, isotope, oxidize, slurry, solute, viscous

Rhymes with ACID

Chasid, Hasid, jassid, placid