Pyrethrum

名词 pyrethrum:

1. made of dried flower heads of pyrethrum plants
2. white-flowered pyrethrum of Balkan area whose pinnate leaves are white and silky-hairy below; source of an insecticide; sometimes placed in genus Chrysanthemum
   同义词：Dalmatian pyrethrum, Dalmatia pyrethrum, Tanacetum cinerariifolium, Chrysanthemum cinerariifolium
3. 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
   同义词：painted daisy, Tanacetum coccineum, Chrysanthemum coccineum
4. used in former classifications for plants later placed in genus Chrysanthemum and now often included in genus Tanacetum
   同义词：genus Pyrethrum

py.re.thrum

n.（名词）
Any of several Old World plants of the genusChrysanthemum, such as C. coccineum, cultivated for their showy flower heads.
菊花：一种东半球菊科 属植物，例如 红花除虫菊 ，因醒目的花朵而被种植
An insecticide made from the dried flower heads ofChrysanthemum cinerariifolium or C. coccineum.
除虫菊杀虫剂：由除虫菊 或 红花除虫菊 的干燥的花朵制成的杀虫药剂

来源：
Latin [pellitory]
拉丁语 [墙草属植物]
from Greek purethron [feverfew]
源自 希腊语 purethron [小白菊]
from pur [fire (from its warming effect)] * see pyretic
源自 pur [火（不自它的加温效果）] *参见 pyretic