Meaning of PYRETHRUM

Pronunciation:			pI'reethrum
WordNet Dictionary
	Definition:		[n]  used in former classifications for plants later placed in genus Chrysanthemum and now often included in genus Tanacetum [n]  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 [n]  white-flowered pyrethrum of Balkan area whose pinnate leaves are white and silky-hairy below; source of an insecticide; sometimes placed in genus Chrysanthemum [n]  made of dried flower heads of pyrethrum plants
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	Synonyms:		Chrysanthemum cinerariifolium, Chrysanthemum coccineum, Dalmatia pyrethrum, Dalmatian pyrethrum, genus Pyrethrum, painted daisy, Tanacetum cinerariifolium, Tanacetum coccineum
	See Also:		aster family, Asteraceae, asterid dicot genus, Compositae, family Asteraceae, family Compositae, flower, genus Tanacetum, herb, herbaceous plant, insect powder, insecticide, Tanacetum
Biology Dictionary
	Definition:		A natural insecticide that is extracted from chrysanthemums. It is a toxic, nonvolatile hydrocarbon related to kerosene.