Pyrethrum

1 definition found

From WordNet (r) 2.0 [wn]:

  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: {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}, {Tanacetum
          coccineum}, {Chrysanthemum coccineum}]
       4: used in former classifications for plants later placed in
          genus Chrysanthemum and now often included in genus
          Tanacetum [syn: {genus Pyrethrum}]