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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