ichthyosaurus definition

  • noun:
    • Any of different extinct fishlike marine reptiles of purchase Ichthyosauria of Triassic duration to the Cretaceous Period.
    • An extinct genus of marine reptiles; -- so named from their particular quick, biconcave vertebræ, resembling those of fishes. A few types, different in total from ten to thirty legs, tend to be known from the Liassic, Oölitic, and Cretaceous structures.
    • The typical genus of Ichthyosauridæ. I. communis is just one of the earliest- and best-known types.
    • [l. c.; pl. ichthyosauri (-rī).] A species regarding the genus Ichthyosaurus; an ichthyosaur.
    • ichthyosaurs of Jurassic

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