/ Dictionary / Index A acetoacetic acid: Meaning and Definition of Find definitions for: a•ce•to•a•ce'tic ac'id Pronunciation: (u-sē"tō-u-sē'tik, -u-set'ik, as"i-tō-), [key] — Chem. Chem. a colorless, oily liquid, CHO, soluble in water, alcohol, and ether: used in synthetic organic chemistry. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. aceto- acetobacter 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