wy·vern also wi·vern (wīvərn)
A two-legged dragon having wings and a barbed tail.
[Alteration of Middle English wyvere, viper, from Old North French wivre, from Latin vīpera; see VIPER.]
(click for a larger image)wyvern
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.