wy·vern /ˈwaɪvɚ/
  雙足飛龍
  Wiv·er Wiv·ern n.
  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. Zool. The weever.
  ◄ ►
  Wy·vern n. Her. Same as Wiver.
  ◄ ►
  wyvern
       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 [syn: wivern]