pyrethrin

 : 
Noun
 : 
py=re=thrin

CIDE DICTIONARY

pyrethrinn. [NL. Pyrethrum, generic name of feverfew, Gr. feverfew.].
     A substance resembling, and isomeric with, ordinary camphor, and extracted from the essential oil of feverfew; -- called also Pyrethrum camphor.  [1913 Webster]

OXFORD DICTIONARY

pyrethrin, n. any of several active constituents of pyrethrum flowers used in the manufacture of insecticides.


For further exploring for "pyrethrin" in Webster Dictionary Online


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