| ichthyosaur | <paleontology> One of the Ichthyosaura. Origin: Cf. F. Ichthyosaure. Source: Websters Dictionary (01 Mar 1998) |
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| ichthyosauria | <paleontology> An extinct order of marine reptiles, including Ichthyosaurus and allied forms; called also Ichthyopterygia. They have not been found later than the Cretaceous period. Origin: NL. See Ichthyosaurus. Source: Websters Dictionary (01 Mar 1998) |
| ichthyosaurian | <paleontology> Of or pertaining to the Ichthyosauria. One of the Ichthyosauria. Source: Websters Dictionary (01 Mar 1998) |
| 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) |