1. 
   Pyrethrum
   [n] - made of dried flower heads of pyrethrum plants 2. [n] - white-flowered pyrethrum of Balkan area whose pinnate leaves are white and silky-hairy below 3. [n] - used in former classifications for plants later placed in genus Chrysanthemum and now often included in genus Tanacetum
   Found op http://www.webdictionary.co.uk/definition.php?query=Pyrethrum
   
   
2. 
   pyrethrum
   (= pyrethroid) Toxic hydrocarbon, originally from chrysanthemum flowers, that now forms the basis for a wide range of ‘natural` synthetic pyrethroid insecticides.
   Found op http://www.encyclo.co.uk/visitor-contributions.php
   
   
3. 
   pyrethrum
   <plant biology> A natural insecticide that is extracted from chrysanthemums. It is atoxic, nonvolatile hydrocarbon related to kerosene. ... (09 Oct 1997) ...
   Found op http://www.mondofacto.com/facts/dictionary?pyrethrum
   
   
4. 
   Pyrethrum
   genus Pyrethrum noun used in former classifications for plants later placed in genus Chrysanthemum and now often included in genus Tanacetum
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=Pyrethrum
   
   
5. 
   pyrethrum
   Dalmatia pyrethrum noun white-flowered pyrethrum of Balkan area whose pinnate leaves are white and silky-hairy below; source of an insecticide; sometimes placed in genus Chrysanthemum
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=pyrethrum
   
   
6. 
   pyrethrum
   any of certain plant species of the genus Tanacetum, native to southwestern Asia, whose aromatic flower heads, when powdered, constitute the active ... [2 related articles]
   Found op http://www.britannica.com/eb/a-z/p/137
   
   
7. 
   Pyrethrum
   Pyrethrum refers to several Old World plants of the genus Chrysanthemum (e.g., C. coccineum) which are cultivated as ornamentals for their showy flower heads. Pyrethrum is also the name of a natural insecticide made from the dried flower heads of C. cinerariifolium and C. coccineum. Some members of...
   Found op http://en.wikipedia.org/wiki/Pyrethrum
   
   
8. 
   pyrethrum
   pyrethrum (pīrē'thrum) : see chrysanthemum.
   Found op http://www.infoplease.com/ce6/sci/A0917868.html
   
   
9. 
   Pyrethrum
   Pyrethrum is a genus of herbaceous composite plants, the distinctive features of which are that the pappus consists of an elevated membranous border, and the achenes are angular but not winged.
   Found op http://www.probertencyclopaedia.com/browse/BPA.HTM
   
   
10. 
    pyrethrum
    Type: Term Pronunciation: pī-rē′thrŭm Definitions: 1. The root of Anacyclus pyrethrum (family Compositae), a shrub native to Morocco; has been used as a sialogogue; its flowers are a source of pyrethrins.
    Found op http://www.medilexicon.com/medicaldictionary.php?t=74472
    
    
11. 
    pyrethrum
    Popular name for several cultivated chrysanthemums. The ornamental species C. coccineum, and hybrids derived from it, are commonly grown in gardens. Pyrethrum powder, made from the dried flower heads of some species, is a powerful pesticide for aphids and mosquitoes. (Genus Chrysanthemum
    Found op http://www.talktalk.co.uk/reference/encyclopaedia/hutchinson/m0015078.html
    
    
12. 
    pyrethrum
    1) Insect powder 2) Insecticide
    Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/pyrethrum/1
    
    

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