plesiosaur

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ple·si·o·saur

 (plē′sē-ə-sôr′, plē′zē-)
n. pl. ple·si·o·saurs
Any of various extinct marine reptiles of the group Plesiosauria of the Mesozoic Era, having paddlelike limbs, a short tail, and sometimes a very long neck.

[New Latin Plēsiosaurus, type genus : Greek plēsios, near to; see pel- in Indo-European roots + Greek sauros, lizard.]

plesiosaur

(ˈpliːsɪəˌsɔː)
n
(Palaeontology) any of various extinct marine reptiles of the order Sauropterygia, esp any of the suborder Plesiosauria, of Jurassic and Cretaceous times, having a long neck, short tail, and paddle-like limbs. See also ichthyosaur Compare dinosaur, pterosaur
[C19: from New Latin plēsiosaurus, from Greek plēsios near + sauros a lizard]

ple•si•o•saur

(ˈpli si əˌsɔr)

n.
any extinct marine reptile of the Jurassic and Cretaceous suborder Plesiosauroidea, having a thick body and paddlelike limbs.
[< New Latin Plesiosaurus (1821) genus name < Greek plēsí(os) near, close to + -o- -o- + saûros -saur]
ple`si•o•sau′roid, adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.plesiosaur - extinct marine reptile with a small head on a long neck a short tail and four paddle-shaped limbsplesiosaur - extinct marine reptile with a small head on a long neck a short tail and four paddle-shaped limbs; of the Jurassic and Cretaceous
archosaur, archosaurian, archosaurian reptile - extinct reptiles including: dinosaurs; plesiosaurs; pterosaurs; ichthyosaurs; thecodonts
genus Plesiosaurus - a reptile genus of suborder Plesiosauria
References in periodicals archive ?
Lyme prepares Anne eventually to turn her back on those dying dinosaurs among whom she's lived, the landed Elliots, and to cast her lot with the ascendant meritocracy of the British navy, the captains whose ships rule the waves where pleisiosaurs and ichthyosaurs once swam.