pyrethrum
noun
py·re·thrum
| \ pī-ˈrē-thrəm
, -ˈre-
\
, -ˈre-
\
Definition of pyrethrum
1
: any of several chrysanthemums with finely divided often aromatic leaves including ornamentals as well as important sources of insecticides
2
: an insecticide made from the dried heads of any of several Old World chrysanthemums (especially Chrysanthemum cinerariaefolium)
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More Definitions for pyrethrum
pyrethrum
noun
py·re·thrum
| \ pī-ˈrē-thrəm
, -ˈreth-rəm
\
, -ˈreth-rəm
\
Medical Definition of pyrethrum
1
: any of several chrysanthemums with finely divided often aromatic leaves including ornamentals as well as important sources of insecticides
2
: an insecticide consisting of or derived from the dried heads of any of several Old World chrysanthemums (genus Chrysanthemum of the family Compositae)