pyrethrum

听听怎么读

英 [paɪˈri:θrəm]

美 [paɪ'riθrəm]

是什么意思

除虫菊，除虫菊杀虫剂；

变形

复数：pyrethrums

英英释义

pyrethrum[ paiə'ri:θrəm, -'re- ]

n.
- made of dried flower heads of pyrethrum plants
- 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 pyrethrumDalmatia pyrethrumTanacetum cinerariifoliumChrysanthemum cinerariifolium
- 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 daisyTanacetum coccineumChrysanthemum coccineum
- used in former classifications for plants later placed in genus Chrysanthemum and now often included in genus Tanacetum
  同义词：genus Pyrethrum

学习怎么用

双语例句

用作名词(n.)

This article draws up the pyrethrum ester insecticide.
本品是拟除虫菊酯类杀虫剂。

权威例句

Pyrethrum flowers and pyrethroid insecticides.
Pyrethrum Flowers. Production, Chemistry, Toxicology, and Uses
Malabaricane derivatives from Pyrethrum santolinoides
Separation of natural pyrethrum extracts using micellar electrokinetic chromatography.
Constituents of pyrethrum flowers; synthesis and relative toxicity of two isomers of cinerin I.
Constituents of Pyrethrum Flowers. XXIII. Cinerolone and the Synthesis of Related Cyclopentenolones
SOME COMPOUNDS RELATED TO SESAMIN: THEIR STRUCTURES AND THEIR SYNERGISTIC EFFECT WITH PYRETHRUM INSECTICIDES
Evaluation of antimicrobial and antioxidant activities of solvent extracts of Anacyclus pyrethrum L., from Algeria
Immunostimulating activity of the hot water-soluble polysaccharide extracts of Anacyclus pyrethrum, Alpinia galanga and Citrullus co...
Genotoxic effects of pentachlorophenol, lindane, transfluthrin, cyfluthrin, and natural pyrethrum on human mucosal cells of the infe...

p开头的单词