Similar words: thrum, pyretic, antipyretic, knife thrust, urethra, brethren, urethral, sore throat. Meaning: [paɪ'rɪːθrəm] 
n. 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 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 4. used in former classifications for plants later placed in genus Chrysanthemum and now often included in genus Tanacetum.
n. 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 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 4. used in former classifications for plants later placed in genus Chrysanthemum and now often included in genus Tanacetum. 
Random good picture Not show
1. This article draws up the pyrethrum ester insecticide.
2. Made with purify carbon dust 、 pyrethrum no smoke 、 taste after light and do not irritate pneogaster 、 safety 、 higher effective.
3. Pyrethrum possesses some ideal characteristics of environmental compatible chemical pesticide, however its photo lability and expensive price limit its broad use in the field.
4. Objective To observe the efficacy of natural pyrethrum mosquito coil against Culex pipiens pallens by bioassay.
5. Wider application of a pyrethrum , rotenone and tobacco, and so on.
6. The Shaoxing yellow wine organic phosphorus remains, the pyrethrum remains had not picked out.
7. The output of some export crops, notably cashews, cotton, and pyrethrum, fell drastically.
7. Sentencedict.com is a sentence dictionary, on which you can find excellent sentences for a large number of words.
8. Role in the nervous system of pests, such as DDT, parathion , carbofuran, esters, such as pyrethrum.
9. The plant materials are materials such as Sophora flavescens, tobacco, Indian chinaberry fruit, pyrethrum, climbing groundsel or Aztec marigold, etc.
10. An insecticide derived from a plant, e . g . pyrethrum ( from Chrysanthemum flowers ).
More similar words: thrum, pyretic, antipyretic, knife thrust, urethra, brethren, urethral, sore throat, urethritis, bulbourethral, urethroplasty, transurethral, urethral orifice, urethrostenosis, pyre, pyrex, pyrexia, empyreal, empyrean, pyrenees, thru, funeral pyre, hyperpyrexia, thrush, thruway, thrust, thruster, thrust out, thrusting, hearthrug.