noun \ˈik-thē-ə-ˌsr\

Definition of ICHTHYOSAUR

:  any of an order (Ichthyosauria) of extinct marine reptiles of the Mesozoic specialized for aquatic life by a streamlined body with a long snout, limbs reduced to small fins for steering, and a large lunate caudal fin
ich·thyo·sau·ri·an \ˌik-thē-ə-ˈsr-ē-ən\ adjective or noun


ultimately from Greek ichthy- + sauros lizard
First Known Use: 1830


Next Word in the Dictionary: Ichthyosauria
Previous Word in the Dictionary: Ichthyornithiformes
All Words Near: ichthyosaur

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