/ Dictionary / Index M metrifonate: Meaning and Definition of Find definitions for: me•trif•on•ate Pronunciation: (mi-trif'u-nāt"), [key] — n. Pharm. an organophosphorus compound, CHClOP, used as an insecticide and anthelmintic. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. metrification metrify Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language