Dictionary

archosaur

noun ar·cho·saur \ˈär-kə-ˌsr\

Definition of ARCHOSAUR

:  any of a subclass (Archosauria) of reptiles comprising the dinosaurs, pterosaurs, and crocodilians
ar·cho·sau·ri·an \ˌär-kə-ˈsr-ē-ən\ adjective or noun
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Origin of ARCHOSAUR

New Latin Archosauria, from Greek archōn + sauros lizard
First Known Use: 1933

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