permethrin

noun per·meth·rin \(ˌ)pər-ˈme-thrən\

Definition of PERMETHRIN

: a synthetic pyrethroid C₂₁H₂₀Cl₂O₃ used especially as an insecticide

per- + methyl + pyrethrin

First Known Use: 1976

Medical Dictionary

noun per·meth·rin \pər-ˈmeth-rən\

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

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