pyrethrin

POS

Noun

HYPHEN

py=re=thrin

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CIDE DICTIONARY

pyrethrin, n. [NL. Pyrethrum, generic name of feverfew, Gr. feverfew.].

A substance resembling, and isomeric with, ordinary camphor, and extracted from the essential oil of feverfew; -- called also Pyrethrum camphor. [1913 Webster]

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OXFORD DICTIONARY

pyrethrin, n. any of several active constituents of pyrethrum flowers used in the manufacture of insecticides.

For further exploring for "pyrethrin" in Webster Dictionary Online

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