RhymeZone: temefos definitions

Definitions of temefos:

noun: (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].

(Definitions from Wiktionary)