Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun pyrethrum

4 senses of pyrethrum

Sense 1
pyrethrum -- (made of dried flower heads of pyrethrum plants)
       => insecticide, insect powder -- (a chemical used to kill insects)

Sense 2
pyrethrum, Dalmatian pyrethrum, Dalmatia pyrethrum, Tanacetum cinerariifolium, Chrysanthemum cinerariifolium -- (white-flowered pyrethrum of Balkan area whose pinnate leaves are white and silky-hairy below; source of an insecticide; sometimes placed in genus Chrysanthemum)
       => herb, herbaceous plant -- (a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests)

Sense 3
painted daisy, pyrethrum, Tanacetum coccineum, Chrysanthemum coccineum -- (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)
       => flower -- (a plant cultivated for its blooms or blossoms)

Sense 4
Pyrethrum, genus Pyrethrum -- (used in former classifications for plants later placed in genus Chrysanthemum and now often included in genus Tanacetum)
       => asterid dicot genus -- (genus of more or less advanced dicotyledonous herbs and some trees and shrubs)