pyrethrin
Pyr"eth*rin, n. Etym: [NL. Pyrethrum, generic name of feverfew, Gr. (Chem.) Defn: A substance resembling, and isomeric with, ordinary camphor, and extracted from the essential oil of feverfew; -- called also Pyrethrum camphor.
Pyr"eth*rin, n. Etym: [NL. Pyrethrum, generic name of feverfew, Gr. (Chem.) Defn: A substance resembling, and isomeric with, ordinary camphor, and extracted from the essential oil of feverfew; -- called also Pyrethrum camphor.