noun, plural dobsonflies.
a large, soft-bodied insect, Corydalus cornutus, having four distinctly veined membranous wings, biting mouthparts, and, in the male, huge mandibles that jut out from the head.
Compare hellgrammite.

1900–05; after surname Dobson; see fly2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
dobsonfly (ˈdɒbsənˌflaɪ)
n , pl -flies
(US), (Canadian) See also hellgrammite a large North American neuropterous insect, Corydalis cornutus: the male has elongated horn-like mouthparts and the larva (a hellgrammite or dobson) is used as bait by anglers: suborder Megaloptera
[C20: origin uncertain, perhaps after the surname Dobson]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
Dragonfly nymphs and dobsonfly larva exhibit many of these characteristics.
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