• WordNet 3.6
    • n Archosauria a large subclass of diapsid reptiles including: crocodiles; alligators; dinosaurs; pterosaurs; plesiosaurs; ichthyosaurs; thecodonts
    • ***
Century Dictionary and Cyclopedia
    • archosauria A name introduced by Cope to distinguish those orders of reptiles which have two temporal arches, the Rhynchocephalia, Crocodilia, Dinosauria, and Pterosauria. According to Zittel, the group properly includes the Squamata in which one or both arches have become obsolete.
    • ***