/ Dictionary / Index A acetanisidine: Meaning and Definition of Find definitions for: a•cet•a•nis•i•dine Pronunciation: (u-sē"tu-nis'i-dēn", -din, as"i-tu-), [key] — n. Pharm. methacetin. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. acetanilide acetate 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