a stout hairy-bodied fly whose larvae are internal parasites of mammals, in particular 胃蝇,尤指
a fly whose larvae (bots) develop within the guts of horses (Gasterophilus and other genera, family Gasterophilidae) N. Amer.a fly of the warble fly family (Oestridae) 马胃蝇(胃蝇属及其他属,胃蝇科) 北美牛蝇的一种(狂蝇科)