First Known Use: 1626
Dictionary
1acid
adjective ac·id \ˈa-səd\
: of, relating to, or having the qualities of an acid
: sharp, strong, and critical in tone
Full 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
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Origin of ACID
French or Latin; French acide, from Latin acidus, from acēre to be sour — more at acet-
Related to ACID
- Antonyms
- amiable, good-humored, good-natured, good-tempered
Other Chemical Engineering Terms
2acid
noun
chemistry : a chemical with a sour taste that forms a salt when mixed with a base
Full Definition of ACID
1
: a sour substance; specifically : any of various typically water-soluble and sour compounds that in solution are capable of reacting with a base to form a salt, redden litmus, and have a pH less than 7, that are hydrogen-containing molecules or ions able to give up a proton to a base, or that are substances able to accept an unshared pair of electrons from a base
2
: something incisive, biting, or sarcastic <a social satire dripping with acid>
See acid defined for English-language learners
First Known Use of ACID
1650
Other Chemical Engineering Terms
Rhymes with ACID
ACID Defined for Kids
1acid
adjective ac·id \ˈa-səd\
Definition of ACID for Kids
1
: having a taste that is sour, bitter, or stinging
2
: harsh or critical in tone <acid remarks>
3
: of, relating to, or like an acid <an acid solution>
— ac·id·ly adverb <spoke acidly>
2acid
noun
Definition of ACID for Kids
: a chemical compound that tastes sour and forms a water solution which turns blue litmus paper red
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