The American Heritage® Dictionary of the English Language, 4th Edition
n. Any of various extinct flying reptiles of the order Pterosauria, including the pterodactyls, of the Jurassic and Cretaceous periods, characterized by wings consisting of a flap of skin supported by the very long fourth digit on each forelimb.
n. any of several extinct flying reptiles, of the order Pterosauria, including the pterodactyls
the GNU version of the Collaborative International Dictionary of English
n. A pterodactyl.
The Century Dictionary and Cyclopedia
n. A member of the Pterosauria; a pterodactyl.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
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
Word Usage
"While this pterosaur is incomplete, the patagial edge is continuous, smoothly concave, and grades neatly into the side of the tarsus (see images above: click on them for larger versions)."