pyrethrum

noun

1. made of dried flower heads of pyrethrum plants

   noun.plant

   Source: WordNet 3.0

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

   noun.plant

   Synonyms chrysanthemum cinerariifolium dalmatia pyrethrum dalmatian pyrethrum tanacetum cinerariifolium

   Source: WordNet 3.0

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

   noun.plant

   Synonyms chrysanthemum coccineum painted daisy tanacetum coccineum

   Source: WordNet 3.0

4. used in former classifications for plants later placed in genus Chrysanthemum and now often included in genus Tanacetum

   noun.plant

   Synonyms genus pyrethrum

   Source: WordNet 3.0