Meaning of biacetyl

bi•a•ce•tyl

Pronunciation: (bī"u-sēt'l, -set'l, bī-as'i-tl), [key]
— n. Chem.
  1. a yellow, water-soluble liquid, CHO, occurring in butter and in certain essential oils, as bay, and also synthesized: used chiefly to augment the flavor and odor of vinegar, coffee, and other foods.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.