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
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Merriam-Webster unabridged
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