pyrethrum(redirected from pyrethrums)
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The root of Anacyclus pyrethrum (family Compositae), a shrub native to Morocco; has been used as a sialogogue; its flowers are a source of pyrethrins.
[G. pyrethron, feverfew, fr. pyr, fire, from the hot-tasting root]
Farlex Partner Medical Dictionary © Farlex 2012
pyrethruman INSECTICIDE prepared from the dried flowers of the chrysanthemum plant, the active ingredient being called pyrethrin.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005