Pyrethrum

Noun	1.	pyrethrum - made of dried flower heads of pyrethrum plants
	2.	pyrethrum - white-flowered pyrethrum of Balkan area whose pinnate leaves are white and silky-hairy below; source of an insecticide; sometimes placed in genus Chrysanthemum Synonyms: Chrysanthemum cinerariifolium, Dalmatia pyrethrum, Dalmatian pyrethrum, Tanacetum cinerariifolium
	3.	pyrethrum - 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 Synonyms: Chrysanthemum coccineum, painted daisy, Tanacetum coccineum
	4.	Pyrethrum - used in former classifications for plants later placed in genus Chrysanthemum and now often included in genus Tanacetum Synonyms: genus Pyrethrum

insect powder, insecticide