PYRETHRIN

Etymology

Noun

pyrethrin (plural pyrethrins)

(organic compound) Any of a number of naturally occurring insecticides extracted from the pyrethrum plant; unusual in having a cyclopropane ring.

Source: Wiktionary

Pyr"eth*rin, n. Etym: [NL. Pyrethrum, generic name of feverfew, Gr. (Chem.)

Definition: A substance resembling, and isomeric with, ordinary camphor, and extracted from the essential oil of feverfew; -- called also Pyrethrum camphor.

Source: Webster’s Unabridged Dictionary 1913 Edition

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