Medical Dictionary


noun py·re·thrum \pī-ˈrē-thrəm, -ˈreth-rəm\

Medical Definition of PYRETHRUM

:  any of several chrysanthemums with finely divided often aromatic leaves including ornamentals as well as important sources of insecticides
:  an insecticide consisting of or derived from the dried heads of any of several Old World chrysanthemums (genus Chrysanthemum of the family Compositae)


July 01, 2015
precarious Hear it
not certain, secure, or steady
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