- any of various long-legged aquatic insects of the heteropterous family Nepidae, which breathe by means of a long spinelike tube that projects from the rear of the body and penetrates the surface of the water
WordReference Random House Unabridged Dictionary of American English © 2026
wa•ter•scor•pi•on
(wô′tər skôr′pē ən, wot′ər-),USA pronunciation n.
- Insectsany of several predaceous aquatic bugs of the family Nepidae, having clasping front legs and a long respiratory tube at the rear of the abdomen: capable of biting if handled.
- water + scorpion 1675–85
Collins Concise English Dictionary © HarperCollins Publishers::
water scorpion n