organon
— Noun
– English
～ a system of principles for philosophic or scientific investigations; an instrument for acquiring knowledge
organophosphate nerve agent
— Noun
– English
～ any of a series of nerve agents containing organophosphate compounds first synthesized by German chemists in 1936; in World War II the Germans tested them in concentration camps but not on the battlefield; Iraq is alleged to have used them against Iran and against the Kurds
organophosphate
— Noun
– English
～ an insecticide that interferes with an insect's nervous system