'Pyrethrum camphor' definitions:

Definition of 'Pyrethrum camphor'

From: GCIDE

Pyrethrin \Pyr"eth*rin\, n. [NL. Pyrethrum, generic name of feverfew, Gr. ? feverfew.] (Chem.) A substance resembling, and isomeric with, ordinary camphor, and extracted from the essential oil of feverfew; -- called also Pyrethrum camphor. [1913 Webster]