pyrethrum flowers
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Pyrethrum — refers to several Old World plants of the genus Chrysanthemum (e.g., C. coccineum ) which are cultivated as ornamentals for their showy flower heads. It is also the name of a natural insecticide made from the dried flower heads of C.… … Wikipedia
PYRETHRUM ROSEUM (ADAMS) M. В. - ПИРЕТРУМ КАВКАЗСКИЙ, КАВКАЗСКАЯ, ПЕРСИДСКАЯ РОМАШКА — см. 964. Многолетнее растение. P. roseum (Adams) M. В. П. кавказский, Кавказская, Персидская ромашка Fl. Taur. Cauc. II (1808) 324. Шалыт (1941) 97. Трошин (1948). Фл. СССР 26 (1961) 217. S y n. Р. carneum M.В.; Chrysanthemum coronopifolium Willd … Справочник растений
pyrethrum — ► NOUN 1) an aromatic plant of the daisy family, typically with brightly coloured flowers. 2) an insecticide made from the dried flowers of these plants. ORIGIN Greek purethron feverfew … English terms dictionary
pyrethrum — /puy ree threuhm, reth reuhm/, n. 1. any of several chrysanthemums, as Chrysanthemum coccineum, having finely divided leaves and showy red, pink, lilac, or white flowers, cultivated as an ornamental. 2. any of several chrysanthemums, as C.… … Universalium
pyrethrum — [pʌɪ ri:θrəm] noun 1》 an aromatic plant of the daisy family, typically with feathery foliage and brightly coloured flowers. [Genus Tanacetum (formerly Pyrethrum): several species.] 2》 an insecticide made from the dried flowers of these plants.… … English new terms dictionary
pyrethrum — (= pyrethroid) Toxic hydrocarbon, originally from chrysanthemum flowers, that now forms the basis for a wide range of ‘natural’ synthetic pyrethroid insecticides … Dictionary of molecular biology
pyrethrum — The root of Anacyclus p. (family Compositae), a shrub native to Morocco; has been used as a sialogogue; its flowers are a source of pyrethrins. [G. pyrethron, feverfew, fr. pyr, fire, from the hot tasting root] * * * py·re·thrum pī rē thrəm, reth … Medical dictionary
pyrethrum — py•re•thrum [[t]paɪˈri θrəm, ˈrɛθ rəm[/t]] n. pl. thrums, thrum 1) pln any of several chrysanthemums, as Chrysanthemum coccineum, having finely divided leaves and showy red, pink, lilac, or white flowers 2) pha the dried flower heads of some of… … From formal English to slang
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. Etymology: L f. Gk purethron feverfew … Useful english 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. Etymology: L f. Gk purethron feverfew … Useful english dictionary
