pyrethroid

noun py·re·throid \-ˈrē-ˌthrȯid, -ˈre-\

Definition of PYRETHROID

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

— pyrethroid adjective

pyrethrin + -oid

First Known Use: 1949

Medical Dictionary

noun py·re·throid \pī-ˈrē-ˌthrȯid, -ˈreth-ˌrȯid\

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

—pyrethroid adjective

Next Word in the Dictionary: pyrethrolonePrevious Word in the Dictionary: pyrethrinAll Words Near: pyrethroid

What made you want to look up pyrethroid? Please tell us where you read or heard it (including the quote, if possible).

Put-downs with flair

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