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The large brownish aquatic larva of the dobsonfly, often used as fishing bait. Also called dobson.
[Probably hell (from its painful bite ) + -grammite, of unknown meaning and origin.]
(Animals) US the larva of the dobsonfly, about 10 cm long with biting mouthparts: used as bait for bass. Also called: dobson
[C19: of unknown origin]
the aquatic larva of a dobsonfly, used as bait in fishing.
[1865–70, Amer.; orig. uncertain]