A midge; general term applied to several species of minute insects, including species of Simulium (buffalo g.) and Hippelates (eye g.). British authors sometimes include mosquitoes in this group, but this is not done in the U.S. [A.S. gnaet]
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guanine nucleotide-binding protein, alpha-transducing
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gnat 'nat n any of various small usu. biting dipteran flies (as a midge or blackfly)
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(nat) a small dipterous insect; see also Diptera. In England the term includes mosquitoes, but in North America it includes only members of Diptera smaller than mosquitoes.Medical dictionary. 2011.