white-flowered pyrethrum of Balkan area whose pinnate leaves are white and silky-hairy below; source of an insecticide; sometimes placed in genus Chrysanthemum
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
used in former classifications for plants later placed in genus Chrysanthemum and now often included in genus Tanacetum
造句
用作名詞(n.)
This article draws up the pyrethrum ester insecticide. 本品是擬除蟲菊酯類殺蟲劑。