Ichthyosauria

Ichthyosauria

Ich`thy*o*sau"ri*a\, n. pl. [NL. See Ichthyosaurus.] (Paleon.) An extinct order of marine reptiles, including Ichthyosaurus and allied forms; -- called also Ichthyopterygia. They have not been found later than the Cretaceous period.
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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