Main Entry: screw·worm

Pronunciation: \ˈskrü-ˌwərm\

Function: noun

Date: 1879

1 : a blowfly (Cochliomyia hominivorax) of the warmer parts of America whose larva develops in sores or wounds or in the nostrils of mammals including humans with serious or sometimes fatal results; especially : its larva
2 : any of several flies other than the screwworm and especially their larvae which parasitize the flesh of mammals