noun ich·thyo·saur \ˈik-thē-ə-ˌsȯr\

Definition of ichthyosaur

  1. :  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


play \ˌik-thē-ə-ˈsȯr-ē-ən\ adjective or noun

Origin and Etymology of ichthyosaur

ultimately from Greek ichthy- + sauros lizard

First Known Use: 1830

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