ˌ ̷ ̷ ̷ ̷ ̷ ̷ˈsȯrēə noun plural
Usage: capitalized
Etymology: New Latin, from plesi- + -sauria
1. : a suborder of Sauropterygia comprising Mesozoic marine reptiles with dorsoventrally flattened bodies and limbs modified into paddles — compare plesiosaurus
2. in some classifications : an order of Reptilia nearly coextensive with Sauropterygia
• ple·si·o·sau·ri·an | ̷ ̷ ̷ ̷ ̷ ̷|sȯrēən adjective or noun
• ple·si·o·sau·roid -ȯˌrȯid adjective