Pterosauria
Pronunciation : Pter`o*sau"ri*a
Part of Speech : n.
Etymology : [NL.] (Paleon.)
Definition : Defn: An extinct order of flying reptiles of the Mesozoic age; the pterodactyls; -- called also Pterodactyli, and Ornithosauria.
Note: 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.
pl.
Source : Webster's Unabridged Dictionary, 1913