Dictionary

permethrin

noun per·meth·rin \(ˌ)pər-ˈme-thrən\

Definition of PERMETHRIN

:  a synthetic pyrethroid C21H20Cl2O3 used especially as an insecticide

Origin of PERMETHRIN

per- + methyl + pyrethrin
First Known Use: 1976

permethrin

noun per·meth·rin \pər-ˈmeth-rən\   (Medical Dictionary)

Medical Definition of PERMETHRIN

:  a synthetic pyrethroid pesticide C21H20Cl2O3 used especially against insects, ticks, and mites

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