Noun
temefos (uncountable)
(pharmacology) An organophosphate larvicide used especially to treat water infested with disease-carrying fleas. [O,O,O′,O′-tetramethyl O,O′-sulfanediylbis(1,4-phenylene) diphosphorothioate].
Temefos is an organophosphorus insecticide used to control mosquito, midge, and black-fly larvae in lakes, ponds, and wetland habitats.