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Webster 1913 Edition

Noun.

(Zool.)

A large North American aquatic salamander (

Protonopsis horrida

Menopoma Alleghaniensis

). It is very voracious and very tenacious of life. Also called

alligator

, and

water dog

hellbender ‎(plural hellbenders)

Cryptobranchus alleganiensis, a giant salamander of North America that inhabits large, swiftly flowing streams with rocky bottoms.
A reckless, headstrong person.