Standard Lemma guide
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
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No pronunciation record was provided for this word.
noun
A synthetic insecticide, C21H20Cl2O3, used to treat head lice, nits, and scabies; as an active ingredient in flea collars; and to eradicate woodworm infestations.
Definition source: English Wiktionary via Wiktextract
Usage: countable, uncountable
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
History
Etymology tree Proto-Indo-European *per-der. Proto-Italic *peri- Latin per- Latin meō Latin perme(ō) English -thrin English permethrin From Latin perme(ō) (“to pervade”) + English -thrin.
