pyrethrum Synonyms
Another word for pyrethrum
• noun (Context 1)
Any of several Eurasian perennial plants formerly classified in the genus Chrysanthemum (now Tanacetum, especially Tanacetum coccineum and Tanacetum cinerariifolium), cultivated as garden flowers for their finely divided aromatic foliage and showy, daisy-like blossoms with white, pink, or crimson ray florets surrounding a yellow central disk.
"She planted rows of pink and white pyrethrums along the sunny border of the cottage garden."
• noun (Context 2)
A natural insecticide prepared from the dried and powdered flower heads of certain pyrethrum plants (especially Tanacetum cinerariifolium), containing active pyrethrin compounds that rapidly paralyze insects.
"The organic farmer sprayed a dilute solution of pyrethrin over the vegetable crops to control the aphid infestation."