pterosauria

from The Century Dictionary.

• An order of extinct Mesozoic Reptillia adapted for flight; the pterosaurians, pterodactyls, ornithosauriaus, or flying-dragons.
• Same as Pterosauridæ.

from the GNU version of the Collaborative International Dictionary of English.

• noun plural (Paleon.) An extinct order of flying reptiles of the Mesozoic age; the pterodactyls; -- called also Pterodactyli, and Ornithosauria.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun extinct flying reptiles: pterosaurs