Look up: pyrethrin

1. Pyrethrin
   Allergic. Neurotoxic. Found in head-lice treatments, house and garden pesticides, and flea-control products.
   Found on http://www.chemicalglossary.net/definiti
   
   
2. pyrethrin
   either of two oily liquid esters of pyrethrolone having high insecticidal properties and occurring especially in pyrethrum flowers Category: agriculture, fisheries, forestry - food processing industries
   Found on http://www.mijnwoordenboek.nl/definition
   
   
3. Pyrethrin
   Pyr'eth·rin noun [ New Latin Pyrethrum , generic name of feverfew, Greek ... feverfew.] (Chemistry) A substance resembling, and isomeric with, ordinary camphor, and extracted from the essential oil of feverfew; -- called also Pyrethrum camphor .
   Found on http://www.encyclo.co.uk/webster/P/203
   
   
4. pyrethrin
   <chemistry> A substance resembling, and isomeric with, ordinary camphor, and extracted from the essential oil of feverfew. ... Synonym: Pyrethrum camphor. ... Origin: NL. Pyrethrum, generic name of feverfew, Gr. Feverfew. ... Source: Websters Dictionary ... (01 Mar 1998) ...
   Found on http://www.mondofacto.com/facts/dictiona
   
   
5. Pyrethrin
   • (n.) A substance resembling, and isomeric with, ordinary camphor, and extracted from the essential oil of feverfew; -- called also Pyrethrum camphor.
   Found on http://thinkexist.com/dictionary/meaning
   
   
6. pyrethrin
   (from the article `poison`) In general, insecticides derived from plants are low in toxicity. Pyrethrins are widely used insecticides in the home. They have a rapid `knockdown` ... ...florists` chrysanthemum (C. morifolium); feverfew (C. parthenium); corn marigold (C. segetum); and tansy (C. vulgare) are popular garden plants....
   Found on http://www.britannica.com/eb/a-z/p/137
   
   
7. pyrethrin
   pyrethrin (pīrē'thrin) : see insecticide.
   Found on http://www.infoplease.com/ce6/sci/A09178
   
   
8. Pyrethrin
   The `pyrethrins` are a pair of natural organic compounds that have potent insecticidal activity. Pyrethrin I and pyrethrin II are structurally related esters with a cyclopropane core, (+)-trans-chrysanthemic acid in the case of pyrethrin I. They differ by the oxidation state of one carbon. Th...
   Found on http://en.wikipedia.org/wiki/Pyrethrin