What does acetic mean?
The definition of acetic
A*ce”tic (#; 277), a.
Etym: [L. acetum vinegar, fr. acere to be sour.] (Chem.)
(a) Of a pertaining to vinegar; producing vinegar; producing vinegar; as, acetic fermentation.
(b) 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.