acetic acid a·ce·tic acid (ə-sē'tĭk)
A clear, colorless organic acid with a distinctive pungent odor, the chief acid of vinegar, also used as a solvent. Also called ethanoic acid.
A clear, colorless organic acid having a distinctive pungent odor. It is used as a solvent and in the manufacture of rubber, plastics, acetate fibers, pharmaceuticals, and photographic chemicals. Acetic acid is the chief acid of vinegar. Chemical formula: C2H4O2.