ichthyosaurus

noun
ich·​thyo·​sau·​rus | \ -rəs\

Definition of ichthyosaurus

1 capitalized : the type genus of Ichthyosauridae comprising highly variable Jurassic ichthyosaurs and originally including most of the later ichthyosaurs most of which are now placed in other genera
2 plural -es : any reptile of the genus Ichthyosaurus

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History and Etymology for ichthyosaurus

New Latin, from ichthy- + -saurus

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