organophosphorus-compounds

noun

1. 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.

noun

1. any of a group of organic compounds containing phosphate groups and used as a pesticide

n.

1. Any of several organic compounds containing phosphorus, some of which are used as fertilizers and pesticides.