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1 definition found
 for Pyrethrum
From WordNet (r) 3.0 (2006) :

  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]

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