plesiosaur
/ˈpliːsɪəsɔː(r)/noun
1- a large fossil marine reptile of the Mesozoic era, with a broad flat body, large paddle-like limbs, and typically a long flexible neck and small head蛇颈龙。
1.1
- Infraorder Plesiosauria, superorder Sauropterygia: several families, including Plesiosauridae.蛇颈龙下目, 鳍龙总目：数科, 包括蛇颈龙科。
词源
mid 19th cent.: from modern Latin Plesiosaurus, from Greek plēsios 'near' + sauros 'lizard'.