any of the minute, black gnats of the dipterous family Simuliidae, having aquatic larvae.
Origin of black fly
First recorded in 1600–10
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for black fly
Historical Examples of black fly
Dinky-Dunk, I notice, is as restive as a bull-moose in black-fly season.
This would explain the rle of the eosinophiles in the black-fly lesion.
Aphides or black-fly may be destroyed by tobacco dust and syringing well with an infusion of soft soap.
There was some kind of an animal inside my shirt, and one that made a mosquito, black-fly, or flea seem tame.
The actual nature of the toxic agent in the black-fly is left a matter of speculation.
British Dictionary definitions for black fly
any small blackish stout-bodied dipterous fly of the family Simuliidae, which sucks the blood of man, mammals, and birdsSee also buffalo gnat
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Any of various small dark humpbacked flies of whom the females are aggressive biters and serve as vectors in the transmission of onchocerciasis.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.