Pyrethrum
WordNet
noun
(1) Used in former classifications for plants later placed in genus Chrysanthemum and now often included in genus Tanacetum
(2) Spring-flowering garden perennial of Asiatic origin having finely divided aromatic leaves and white to pink-purple flowers; source of an insecticide; sometimes placed in genus Chrysanthemum
(3) White-flowered pyrethrum of Balkan area whose pinnate leaves are white and silky-hairy below; source of an insecticide; sometimes placed in genus Chrysanthemum
(4) Made of dried flower heads of pyrethrum plants
WiktionaryText
Noun
- a perennial African plant, Chrysanthemum cinerariaefolium, that is the source of the pyrethrin insecticides