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black fly

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noun
any of the minute, black gnats of the dipterous family Simuliidae, having aquatic larvae.
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Also called buffalo gnat.

Origin of black fly

First recorded in 1600–10
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use black fly in a sentence

British Dictionary definitions for black fly (1 of 2)

blackfly
/ (ˈblækˌflaɪ) /

noun plural -flies
a black aphid, Aphis fabae, that infests beans, sugar beet, and other plantsAlso called: bean aphid

British Dictionary definitions for black fly (2 of 2)

black fly

noun
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

Medical definitions for black fly

black fly

n.
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.
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