pyrethrum

views updated May 29 2018

py·re·thrum / pīˈrē[unvoicedth]rəm; -ˈre[unvoicedth]rəm/ • n. an aromatic plant (genus Tanacetum, formerly Chrysanthemum or Pyrethrum) of the daisy family, typically having feathery foliage and brightly colored flowers. ∎  an insecticide made from the dried flowers of these plants.

pyrethrum

views updated May 11 2018

pyrethrum An insecticide (see pesticide) prepared from the flowers of Chrysanthemum cinerariifolium. It penetrates the insect's cuticle and is fast-acting, nontoxic to other animals and to plants, and readily biodegradable.

pyrethrum

views updated May 29 2018

pyrethrum pellitory of Spain XVI; feverfew XIX. — L. — Gr. púrethron feverfew.