'Wyvern' definitions:

Definition of 'wyvern'

(from WordNet)
noun
A fire-breathing dragon used in medieval heraldry; had the head of a dragon and the tail of a snake and a body with wings and two legs [syn: wyvern, wivern]

Definition of 'Wyvern'

From: GCIDE
  • Wyvern \Wy"vern\, n. (Her.) Same as Wiver. [1913 Webster]

Definition of 'wyvern'

From: GCIDE
  • Wiver \Wiv"er\, Wivern \Wiv"ern\, n. [OE. wivere a serpent, OF. wivre, guivre, F. givre, guivre, wiver, from L. vipera; probably influenced by OHG. wipera, from the Latin. See Viper, and cf. Weever.] [1913 Webster]
  • 1. (Her.) A fabulous two-legged, winged creature, like a cockatrice, but having the head of a dragon, and without spurs. [Written also wyvern.] [1913 Webster]
  • The jargon of heraldry, its griffins, its mold warps, its wiverns, and its dragons. --Sir W. Scott. [1913 Webster]
  • 2. (Zool.) The weever. [1913 Webster]