Pter"o*saur(?), n. [Gr. wind + a lizard.] (Paleon.) A pterodactyl.
Pter`o*sau"ri*a(?), n. pl. [NL.] (Paleon.) An extinct order of flying reptiles of the Mesozoic age; the pterodactyls; -- called also Pterodactyli, and Ornithosauria.
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.
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