(n) an extinct reptile of the Jurassic and Cretaceous having a bird-like beak and membranous wings supported by the very long fourth digit of each forelimb, Syn.flying reptile
‖n. pl. [ NL. ] (Paleon.) An extinct order of flying reptiles of the Mesozoic age; the pterodactyls; -- called also Pterodactyli, and Ornithosauria. [ 1913 Webster ]
☞ The wings were formed, like those of bats, by a leathery expansion of the skin, principally supported by the greatly enlarged outer or “ little” fingers of the hands. The American Cretaceous pterodactyls had no teeth. See Pteranodontia, and Pterodactyl. [ 1913 Webster ]
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