Definitions from Wiktionary (pyrethrum)

▸ noun:  Any of several daisy-like perennial African plants of the genus Tanacetum, especially Tanacetum cinerariifolium.
▸ noun:  Anacyclus pyrethrum (pellitory of Spain)
▸ noun:  (organic chemistry) Any of several insecticides obtained from these plants; pyrethrin.
▸ Also see pyrethrum


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