wivern

1. n. A fabulous two-legged, winged creature, like a cockatrice, but having the head of a dragon, and without spurs. Source: opted

2. n. The weever. Source: opted

3. n. 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 Source: wordnet

4. 1. (Her.) A fabulous two-legged, winged creature, like a cockatrice, but having the head of a dragon, and without spurs. [Written also wyvern.] The jargon of heraldry, its griffins, its mold warps, its wiverns, and its dragons. Sir W. Scott. 2. (Zoöl.) The weever. Source: webster

5. n 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 Source: ecdict

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