Permethrin definition

pər-mĕthrĭn
A topical insecticide, C21 H20 CL2 O3 , used to treat head lice and nits, scabies, and various species of ticks.
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A synthetic pyrethroid, C21 H20 Cl2 O3 , used as an agricultural, industrial, and residential insecticide, to treat scabies and head lice in humans, and to control fleas and ticks in dogs.
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A synthetic insecticide, C21H20Cl2O3, used to treat head lice, nits, scabies, and in flea collars.
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Other Word Forms

Noun

Singular:
permethrin
Plural:
permethrins

Origin of permethrin

  • per– (res)methrin a pyrethroid (resm- of unknown origin) ((pyr)ethrin)

    From American Heritage Dictionary of the English Language, 5th Edition