PTEROSAURIA

‖Pter′o‐sau″ri‐a (?), n. pl. [] (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.