1. large aggressive freshwater turtle with powerful jaws
The Collaborative International Dictionary of English v.0.48:
a. & n. from Snap, v.
Snapping beetle. (Zool.) See Snap beetle, under Snap.
Snapping turtle. (Zool.)
(a) A large and voracious aquatic turtle (Chelydra
serpentina) common in the fresh waters of the United
States; -- so called from its habit of seizing its prey
by a snap of its jaws. Called also mud turtle.
(b) See Alligator snapper, under Alligator.
WordNet (r) 3.0 (2006):
n 1: large aggressive freshwater turtle with powerful jaws