the larva of any of certain flies of the genus Callitroga, which sometimes infests wounds and the nose and navel of domestic animals and humans.
- screwed up,
- screwworm fly,
Origin of screwworm
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
the larva of a dipterous fly, Callitroga macellaria, that develops beneath the skin of living mammals often causing illness or death
the fly producing this larva: family Calliphoridae
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012