Top Definition
A organic chemical substance, with the structural formula R-COOH.

They often are volatile and some are responsible for foul odors.

Some can be quite corrosive and toxic such as Ethanoic/Acetic acid, Formic/Methanoic.

When in long chains they are known as fatty acids.
Vinegar is a diluted form of the carboxylic acid ethanoic acid traditional produced by fermentation of alcoholic beverages such as beer or cider.
by urface123 September 25, 2009

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