pyrethrum

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]

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py·re·thrum pī-'rē-thrəm, -'reth-rəm n
1) any of several chrysanthemums with finely divided often aromatic leaves including ornamentals as well as important sources of insecticides
2) an insecticide consisting of or derived from the dried heads of any of several Old World chrysanthemums (genus Chrysanthemum of the family Compositae)

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Py·re·thrum (pi-reґthrəm) former genus name applied to certain plants of genus Chrysanthemum that are sources of pyrethrins.

Medical dictionary. 2011.

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  • Pyrethrum — ist ein Insektizid, das aus den Blüten von verschiedenen Tanacetum Arten gewonnen wird. Die Hauptwirkstoffe sind Pyrethrine, außerdem Cinerine und Jasmoline. Inhaltsverzeichnis 1 Herstellung 2 Anbau 3 Wirtschaftliche Bedeutung …   Deutsch Wikipedia

  • 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 — Saltar a navegación, búsqueda Pyrethrum puede referirse a: El nombre común de la planta Chrysanthemum cinerariaefolium El sinónimo del género botánico Tanacetum Obtenido de Pyrethrum Categoría: Wikipedia:Desambiguación …   Wikipedia Español

  • Pyrethrum — (P. Gärtn.), aus mehren Arten von Chrysanthemum gebildete Pflanzengattung aus der Familie der Compositae Senecionideae Anthemideae, 19. Kl. 2. Ordn. L.; Arten: P. Myroni, mit gelben Blüthen; P. indicum, in China, Japan, Ostindien, strauchartig,… …   Pierer's Universal-Lexikon

  • Pyrethrum — Pyrethrum, s. Chrysanthemum …   Meyers Großes Konversations-Lexikon

  • Pyrethrum — Pyrĕthrum, Pflanzenart, s. Chrysanthemum …   Kleines Konversations-Lexikon

  • 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 — [pī reth′rəm, pīrē′thrəm] n. [ModL < L < Gr pyrethron, feverfew < pyr, FIRE] 1. a perennial plant (Chrysanthemum coccineum) of the composite family, widely grown for the white, pink, red, or purple flower heads 2. an insecticide made… …   English World 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 — Py|re|thrum auch: Py|reth|rum 〈n.; s, re|thra〉 aus Wucherblumen (Chrysanthemen) gewonnenes Insektengift [<grch. pyrethron; zu pyr „Feuer“] * * * Py|re|th|rum, das; s, …ra [griech. pýrethron = Mauerkraut, zu: pỹr ↑ (pyro , Pyro ), wohl wegen… …   Universal-Lexikon

  • Pyrethrum — Pyrèthre Pyrèthre …   Wikipédia en Français

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