Archosauria
plural noun
Ar·cho·sau·ria
ˌär-kə-ˈsȯr-ē-ə
: 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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Merriam-Webster unabridged
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