/ Dictionary / Index M metronidazole: Meaning and Definition of Find definitions for: met•ro•ni•da•zole Pronunciation: (me"tru-nī'du-zōl"), [key] — n. Pharm. a synthetic antimicrobial substance, CHNO, used chiefly in the treatment of infections, such as Trichomonas vaginalis and certain anaerobic bacterial infections. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: metronidazole (Thesaurus) metrology metronome Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language