Noun Acid Definition and Examples





1. Chemistry. a compound usually having a sour taste and capable of neutralizing alkalis and reddening blue litmus paper, containing hydrogen that can be replaced by a metal or an electropositive group to form a salt, or containing an atom that can accept a pair of electrons from a base. Acids are proton donors that yield hydronium ions in water solution, or electron-pair acceptors that combine with electron-pair donors or bases.

2. a substance with a sour taste.

3. something, as a remark or piece of writing, that is sharp, sour, or ill-natured: His criticism was pure acid.

4. Slang. LSD2 . adjective

5. Chemistry. belonging or pertaining to acids or the anhydrides of acids. having only a part of the hydrogen of an acid replaced by a metal or its equivalent: an acid phosphate. having a pH value of less than

7.Compare alkaline (def 4).

6. sharp or biting to the taste; tasting like vinegar; sour: acid fruits.

7. sharp, biting, or ill-natured in mood, manner, etc.: an acid remark; an acid wit.

8. Geology. containing much silica.

9. Metallurgy. noting, pertaining to, or made by a process in which the lining of the furnace, or the slag that is present, functions as an acid in high-temperature reactions in taking electrons from oxide ions: usually a siliceous material, as sand or ganister.Compare basic (def 3). Idioms 10. put on the acid, Australian Slang. to importune someone, as for money, sexual favors, or confidential information.


"There can be acid tryptophans."
"There can be acid serines."
"There can be acid series."
"There can be acid sequences."
"There can be acid residues."
"There can be acid patterns."
"There can be acid oxidises."
"There can be acid metabolisms."
"There can be acid intermediates."
"There can be acid insertions."
"There can be acid deoxyriboses."
"There can be acid causes."
"There can be acid bases."
"acids can be in positions."
"acids can be in proteins."
"acids can be to waters."
"acids can be to conditions."
"acids can be in patients."
"acids can be in rats."
"acids can be in people/places/organizations."

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