/ Dictionary / Index A acetanilide: Meaning and Definition of Find definitions for: ac•et•an•i•lide Pronunciation: (as"i-tan'l-īd"), [key] — n. Chem., Pharm. a white, crystalline, odorless, organic powder, CHNO, produced by the action of glacial acetic acid on aniline, used chiefly in organic synthesis and formerly in the treatment of fever and headache. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: acetanilide (Thesaurus) acetaminophen acetanisidine Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language