botfly(redirected from Bot-fly)
Also found in: Dictionary, Thesaurus, Encyclopedia.
an insect of the family Oestridae whose larvae (called bots) are parasitic, especially in horses and sheep. Genera include Oestrus, Gasterophilus, and Dermatobia.
Robust, hairy fly of the order Diptera, often strikingly marked in black and yellow or gray, the larvae of which produce a variety of myiasis conditions in humans and various domestic animals, especially herbivores.
Any of various stout dipteran flies of the family Oestridae, having larvae that are parasitic on mammals, including livestock and sometimes humans.
Any of several flies of the family Oestridae and other families whose maggots (larvae) are parasitic on the skin of mammals.See: Dermatobia; myiasis