plural noun
Ar·​cho·​sau·​ria | \ˌär-kə-ˈsȯr-ē-ə\

Definition of Archosauria 

: a large subclass of Reptilia comprising the dinosaurs, pterosaurs, and crocodilians all distinguished by possessing temporal openings separated from each other by a postorbitosquamosal arch

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Other Words from Archosauria

archosaurian \ ¦ar-​kə-​¦sȯr-​ē-​ən \ adjective or noun

History and Etymology for Archosauria

New Latin, from archo- (from Greek archōn) + -sauria

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