Definify.com
Webster 1913 Edition
Wivern
{
Wiv′er
,Wiv′ern
, }Noun.
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.