| ichthyosaurus | Origin: NL, fr. Gr. 'ichqys, -yos, a fish + say^ros a lizard. <paleontology> An extinct genus of marine reptiles; so named from their short, biconcave vertebrae, resembling those of fishes. Several species, varying in length from ten to thirty feet, are known from the Liassic, Oolitic, and Cretaceous formations. Source: Websters Dictionary (01 Mar 1998) |
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