archosaur

ar·cho·saur

A0409750 (är′kə-sôr′)n. Any of various vertebrates of the group Archosauria, having a single opening in each side of the skull in front of the eye socket, and including the dinosaurs, birds, pterosaurs, and modern crocodilians.

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[New Latin Archosauria, subclass name : Greek arkhos, ruler + Greek sauros, lizard.]

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ar′cho·saur′i·an n. & adj.

archosaur

(ˈɑːkəˌsɔː) n (Animals) any of a group of reptiles consisting of dinosaurs, pterosaurs, modern birds, modern crocodiles and extinct relatives of crocodiles, all having a diapsid skull

ar•cho•saur

(ˈɑr kəˌsɔr)

n. any reptile of the subclass Archosauria, including the dinosaurs, pterosaurs, and crocodilians. [1965–70; < New Latin Archosaurus < Greek árcho(s) leader, ruler + saûr(os) -saur]

ar·cho·saur

(är′kə-sôr′) Any of a mostly extinct group of reptiles which includes the dinosaurs, pterosaurs, and the modern crocodiles and other crocodilians.

Thesaurus

Noun

1.

archosaur - extinct reptiles including: dinosaurs; plesiosaurs; pterosaurs; ichthyosaurs; thecodontsarchosaurian, archosaurian reptilediapsid, diapsid reptile - reptile having a pair of openings in the skull behind each eyeArchosauria, subclass Archosauria - a large subclass of diapsid reptiles including: crocodiles; alligators; dinosaurs; pterosaurs; plesiosaurs; ichthyosaurs; thecodontsdinosaur - any of numerous extinct terrestrial reptiles of the Mesozoic eraflying reptile, pterosaur - 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 forelimbthecodont, thecodont reptile - presumably in the common ancestral line to dinosaurs and crocodiles and birdsichthyosaur - any of several marine reptiles of the Mesozoic having a body like a porpoise with dorsal and tail fins and paddle-shaped limbsplesiosaur, plesiosaurus - extinct marine reptile with a small head on a long neck a short tail and four paddle-shaped limbs; of the Jurassic and Cretaceousnothosaur - extinct marine reptile with longer more slender limbs than plesiosaurs and less completely modified for swimming