a common dipterous fly, Musca domestica, that frequents human habitations, spreads disease, and lays its eggs in carrion, decaying vegetables, etc: family Muscidae
housefly in American English
(ˈhaʊsˌflaɪ)
nounWord forms: pluralˈhouseˌflies
any of a genus (Musca) of disease-carrying muscid flies found in and around houses, and feeding on garbage, manure, and food; esp., a common worldwide species (M. domestica)