/dob"seuhn fluy'/ , n. , pl. 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. Cf. hellgrammite .
[ 1900-05; after surname Dobson; see FLY 2 ]