Main Entry: screw·worm

Pronunciation: \ˈskrü-ˌwərm\

Function: noun

1 : either of two dipteran flies of the genus Cochliomyia: a : one (C. 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 b : secondary screwworm
2 : a dipteran fly of the genus Chrysomyia (C. bezziana) that causes myiasis in the Old World