trichlorfon
noun
tri·chlor·fon (ˌ)trī-ˈklȯr-ˌfän 
variants or less commonly trichlorphon
: a crystalline compound C4H8Cl3O4P used especially as an insecticide
Example Sentences
Recent Examples on the Web Five of these chemicals -- naled, methamidophos, trichlorfon, chlorpyrifos and phorate -- showed up in at least 10% of the cord blood samples. 
Susan Scutti, CNN, 9 June 2017
Susan Scutti, CNN, 9 June 2017 Word History
Etymology
tri- + chlor- + -fon (irregular from phosphonate, a salt derived from phosphine)
First Known Use
1960, in the meaning defined above
Medical Definition
trichlorfon
noun
tri·chlor·fon
variants also trichlorphon
(ˈ)trī-ˈklō(ə)r-ˌfän, -ˈklȯ(ə)r-
: an organophosphate C4H8Cl3O4P used as a parasiticide in veterinary medicine
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