ˌärkəˈsȯrēə noun plural
Usage: capitalized
Etymology: New Latin, from archo- (from Greek archōn ) + -sauria
: 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
• ar·cho·sau·ri·an | ̷ ̷ ̷ ̷| ̷ ̷rēən adjective or noun