Medical Dictionary

pyrethrum

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

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)
March 31, 2015
refluent Hear it
Flowing back
Take a 3-minute break and test your skills!
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears