pyrethrum

Other forms: pyrethrums

Definitions of pyrethrum

1. noun

   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

   type of:

   herb, herbaceous plant

   a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests
2. noun

   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, Tanacetum coccineum, painted daisy

   type of:

   flower

   a plant cultivated for its blooms or blossoms
3. noun

   made of dried flower heads of pyrethrum plants
   type of:

   insect powder, insecticide

   a chemical used to kill insects