pterosaur
noun
ptero·saur
ˈter-ə-ˌsȯr
: any of an order (Pterosauria) of extinct flying reptiles existing from the Late Triassic throughout the Jurassic and most of the Cretaceous and having a featherless wing membrane extending from the side of the body along the arm to the end of the greatly elongated fourth digit
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Merriam-Webster unabridged
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