/ Dictionary / Index A acetonitrile: Meaning and Definition of Find definitions for: ac•e•to•ni•trile Pronunciation: (as"i-tō-nī'tril, -trēl, u-sē"tō-), [key] — n. Chem. a colorless, poisonous, water-soluble liquid, CHN, having an etherlike odor: used chiefly in organic synthesis and as a solvent. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. acetonemia acetonuria Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language