[1] : The Collaborative International Dictionary of English v.0.48

acetic \ace"tic\ ; 277, a. 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.
       1913 webster

[2] : WordNet (r) 2.0

acetic
     adj : relating to or containing acetic acid

Acetic >> A Words
Acetic, definition of term: Acetic
acetic_pag1.html

Acetic Acid >> A Words
Acetic Acid, definition of term: Acetic Acid
acetic+acid_pag1.html