Hypertext Webster Gateway: "Plesiosauria"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Plesiosauria \Ple`si*o*sau"ri*a\, n. pl. [NL. See
{Plesiosaurus}.] (Paleon.)
An extinct order of Mesozoic marine reptiles including the
genera Plesiosaurus, and allied forms; -- called also
{Sauropterygia}.
From WordNet (r) 1.7 (wn)
Plesiosauria
n : any of the plesiosaurs [syn: {Plesiosauria}, {suborder
Plesiosauria}]
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