<chemistry> Of a pertaining to vinegar; producing vinegar; producing vinegar; as, acetic fermentation.

Pertaining to, containing, or derived from, acetyl, as acetic ether, acetic acid. The latter is the acid to which the sour taste of vinegar is due.

Origin: L. Acetum = vinegar, fr. Acere to be sour.

(01 Mar 1998)