deer fly(redirected from Deer-fly)
Also found in: Medical.
deer·flyor deer fly (dîr′flī′)
Any of various biting tabanid flies of the genus Chrysops, the females of which feed on the blood of mammals. Deerflies are smaller than horseflies and usually have a dark band on the wings.
any of several tabanid flies of the genus Chrysops, the female of which is a vector of tularemia.