sau·rop·te·ryg·ia \sȯˌräptəˈrijēə\noun plural Usage: capitalized Etymology: New Latin, from saur- + pteryg- + -ia : an order of Reptilia comprising forms more or less completely adapted to a marine environment and usually including the suborders Nothosauria and Plesiosauria • sau·rop·te·ryg·i·an\ ̷ ̷| ̷ ̷ ̷ ̷|rijēən\adjective or noun