Medical Dictionary


noun py·re·throid \pī-ˈrē-ˌthrid, -ˈreth-ˌrid\

Medical Definition of PYRETHROID

:  any of various synthetic compounds that are related to the pyrethrins and resemble them in insecticidal properties
pyrethroid adjective


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