Word Study
pyrethrum
WORDNET DICTIONARY
Noun pyrethrum has 4 senses
- pyrethrum(n = noun.plant) Array - made of dried flower heads of pyrethrum plants; Array is a kind of insect powder, insecticide
- pyrethrum(n = noun.plant) chrysanthemum cinerariifolium, dalmatia pyrethrum, dalmatian pyrethrum, tanacetum 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; Array is a member of genus tanacetum, tanacetum
- pyrethrum(n = noun.plant) chrysanthemum coccineum, painted daisy, tanacetum 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; Array is a kind of flower
- pyrethrum(n = noun.plant) genus pyrethrum - used in former classifications for plants later placed in genus Chrysanthemum and now often included in genus Tanacetum; Array is a kind of asterid dicot genus
is a kind of herb, herbaceous plant
is a member of genus tanacetum, tanacetum
is a member of aster family, asteraceae, compositae, family asteraceae, family compositae
OXFORD DICTIONARY
pyrethrum, n.
1 any of several aromatic chrysanthemums of the genus Tanacetum, esp. T. coccineum.
2 an insecticide made from the dried flowers of these plants, esp. Tanacetum cinerariifolium.
1 any of several aromatic chrysanthemums of the genus Tanacetum, esp. T. coccineum.
2 an insecticide made from the dried flowers of these plants, esp. Tanacetum cinerariifolium.
Etymology
L f. Gk purethron feverfew
For further exploring for "pyrethrum" in Webster Dictionary Online
