Bible Dictionaries
Pyrethrin
Webster's Dictionary
(n.) A substance resembling, and isomeric with, ordinary camphor, and extracted from the essential oil of feverfew; - called also Pyrethrum camphor.
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Bibliography Information
Webster, Noah. Entry for 'Pyrethrin'. Noah Webster's American Dictionary. https://www.studylight.org/dictionaries/eng/web/p/pyrethrin.html. 1828.