pyrethrum

/pai'ri:θrәm/

中文翻译

n. [植]除虫菊, [药]除虫菊杀虫剂

英文解释

n made of dried flower heads of pyrethrum plants

n white-flowered pyrethrum of Balkan area whose pinnate leaves are white and silky-hairy below; source of an insecticide; sometimes placed in genus Chrysanthemum

n spring-flowering garden perennial of Asiatic origin having finely divided aromatic leaves and white to pink-purple flowers; source of an insecticide; sometimes placed in genus Chrysanthemum

n used in former classifications for plants later placed in genus Chrysanthemum and now often included in genus Tanacetum

词态变化

复数形式:pyrethrums

常见例句

Pellitory of Spain (Anacyclus pyrethrum).

-- called also Pyrethrum camphor.

n made of dried flower heads of pyrethrum plants n white-flowered pyrethrum of Balkan area whose pinnate leaves are white and silky-hairy below

plural of pyrethrum n made of dried flower heads of pyrethrum plants n white-flowered pyrethrum of Balkan area whose pinnate leaves are white and silky-hairy below