pyrethrum

py re thrum |pīˈrēTHrəm, -ˈreTHrəm paɪˈriθrəm | ▶noun an aromatic plant of the daisy family, typically having feathery foliage and brightly colored flowers. [Genus Tanacetum (formerly Chrysanthemum or Pyrethrum ), family Compositae: several species, in particular T. coccineum, grown as an ornamental, and T. cinerariifolium, grown as a source of the insecticide pyrethrum. ] • an insecticide made from the dried flowers of these plants. ORIGIN Middle English (denoting pellitory ): from Latin, from Greek purethron ‘feverfew. ’ The current senses (based on the former genus name ) date from the late 19th cent.

pyrethrum

pyrethrum |pʌɪˈriːθrəm | ▶noun an aromatic plant of the daisy family, typically having feathery foliage and brightly coloured flowers. ●Genus Tanacetum (formerly Chrysanthemum or Pyrethrum ), family Compositae: several species, in particular T. coccineum, grown as an ornamental, and T. cinerariifolium, grown as a source of the insecticide pyrethrum. • [ mass noun ] an insecticide made from the dried flowers of pyrethrum plants. ORIGIN Middle English (denoting pellitory ): from Latin, from Greek purethron ‘feverfew ’. The current senses (based on the former genus name ) date from the late 19th cent.

Pyrethrum

Py re th rum , Py re thrum Substantiv, Neutrum , das |Pyr e thrum |das Pyrethrum; Genitiv: des Pyrethrums, Plural: die Pyrethra griechisch pýrethron = Mauerkraut, zu: pỹr ( pyro- , Pyro- ), wohl wegen der wärmenden Wirkung des Pflanzenextrakts 1 veraltend Chrysanthemum 2 Insektizid aus den getrockneten Blüten verschiedener Chrysanthemen