/ Dictionary / Index A acetobacter: Meaning and Definition of Find definitions for: a•ce•to•bac•ter Pronunciation: (u-sē"tu-bak'tur, as"i-tō-, u-sē'tu-bak"tur), [key] — n. Bacteriol. any of several ellipsoidal or rodshaped aerobic bacteria of the genus Acetobacter, certain species of which are used in making vinegar. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. acetoacetic acid acetoin Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language