A two winged insect of the Order Diptera. Includes the housefly and the myiasis - causing flies. Also includes the mosquitoes and the tsetse flies.
n. a two-winged insect belonging to a large group called the Diptera. The mouthparts of flies are adapted for sucking and sometimes also for piercing and biting. Fly larvae (maggots) may infest human tissues and cause disease (see myiasis).