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