Hypertext Webster Gateway: "Plesiosaurus"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Plesiosaurus \Ple`si*o*sau"rus\, n.; pl. {Plesiosauri}. [NL.,
fr. Gr ? near + ? a lizard.] (Paleon.)
A genus of large extinct marine reptiles, having a very long
neck, a small head, and paddles for swimming. It lived in the
Mesozoic age.
From WordNet (r) 1.7 (wn)
plesiosaurus
n : extinct marine reptile with a small head on a long neck a
short tail and four paddle-shaped limbs; of the Jurassic
and Cretaceous [syn: {plesiosaur}]
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