wyvern
Pronunciation: /ˈwīvərn
noun
Heraldry
a winged two-legged dragon with a barbed tail.
Origin
late Middle English (denoting a viper): from Old French wivre, from Latin vipera.
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"Why, Vern, Isn't that a Wyvern on the top of the cliff?"
"No, Margit, that's a Hudson Hornet. They do look a bit alike, though."
"Idiot, not the car, that hideous creature that is now headed our way. RUN!"