Archosauria
Also found in: Dictionary, Thesaurus.
Archosauria
[‚är·kə′sȯr·ē·ə] (vertebrate zoology)
A subclass of reptiles composed of five orders: Thecodontia, Saurischia, Ornithschia, Pterosauria, and Crocodilia.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.