[ awr-guh-noh-fos-feyt, awr-gan-uh‐ ]
/ ˌɔr gə noʊˈfɒs feɪt, ɔrˌgæn ə‐ /


Biochemistry. 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.

Origin of organophosphate

First recorded in 1945–50; organo- + phosphate
Also called or·ga·no·phos·pho·rus com·pounds [awr-guh-noh-fos-fer-uh s, awr-gan-uh‐] /ˌɔr gə noʊˈfɒs fər əs, ɔrˌgæn ə‐/. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for organophosphate

/ (ɔːˌɡænəʊˈfɒsfeɪt) /


any of a group of organic compounds containing phosphate groups and used as a pesticide
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for organophosphate

[ ôr′găn′ə-fŏsfāt ]


Any of several organic compounds containing phosphorus, some of which are used as fertilizers and pesticides.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.