pyrethrum   (TTS Sound)

The noun pyrethrum has 4 senses

• pyrethrum -- (made of dried flower heads of pyrethrum plants)


• pyrethrum, Dalmatian pyrethrum, Dalmatia pyrethrum, Tanacetum cinerariifolium, Chrysanthemum cinerariifolium -- (white-flowered pyrethrum of Balkan area whose pinnate leaves are white and silky-hairy below; source of an insecticide; sometimes placed in genus Chrysanthemum)


• painted daisy, pyrethrum, Tanacetum coccineum, Chrysanthemum coccineum -- (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)


• Pyrethrum, genus Pyrethrum -- (used in former classifications for plants later placed in genus Chrysanthemum and now often included in genus Tanacetum)