Wiver
Wiver , noun
[Old English wivere a serpent, Old French wivre, guivre, French givre, guivre, wiver, from Latin vipera; probably influenced by Old High German wipera, from the Latin. See Viper, and compare Weever.]
1.
(Heraldry) A fabulous two-legged, winged creature, like a cockatrice, but having the head of a dragon, and without spurs.
The jargon of heraldry, its griffins, its mold warps, its wiverns, and its dragons.
2.
(Zoology) The weever.
Also: Wivern