Breadcrumb Home > Dictionary > Index O organophosphate: Meaning and Definition of Find definitions for: or•ga•no•phos•phate Pronunciation: (ôr"gu-nō-fos'fāt, ôr-gan"u-), [key] — n. any of a variety of organic compounds that contain phosphorus and often have intense neurotoxic activity: originally developed as nerve gases, now widely used as insecticides and fire retardants. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: organophosphate (Thesaurus) organon organosilicon ✖ Related Content Daily Word Quiz: acronym Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language