Definition of pyrethrum

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  • pyrethrum is a valid Scrabble US word with a point value of 19
  • pyrethrum is a valid Scrabble UK word with a point value of 19
  • pyrethrum is a valid Words with friends word with a point value of 20

Definition of pyrethrum

  • 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)

    Synonyms

    1. chrysanthemum coccineum
    2. painted daisy
    3. tanacetum coccineum
  • used in former classifications for plants later placed in genus Chrysanthemum and now often included in genus Tanacetum (noun)

    Synonyms

    1. genus pyrethrum
  • 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)

    Synonyms

    1. chrysanthemum cinerariifolium
    2. dalmatia pyrethrum
    3. dalmatian pyrethrum
    4. tanacetum cinerariifolium
  • made of dried flower heads of pyrethrum plants (noun)

See definition of pyrethrum in Merriam Webster