Plesiosauria
plural noun
Ple·si·o·sau·ria
ˌplēsēəˈsȯrēə
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
plesiosaurian adjective or noun
¦⸗⸗⸗¦sȯrēən
plesiosauroid adjective
-ȯˌrȯid
Word History
Etymology
New Latin, from plesi- + -sauria