noun ar·cho·saur \ˈär-kə-ˌsȯr\

Definition of archosaur

  1. :  any of a subclass (Archosauria) of reptiles comprising the dinosaurs, pterosaurs, and crocodilians


play \ˌär-kə-ˈsȯr-ē-ən\ adjective or noun

Origin and Etymology of archosaur

New Latin Archosauria, from Greek archōn + sauros lizard

First Known Use: 1933

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