cotylosaur

noun
co·ty·lo·saur | \ˈkä-tə-lō-ˌsȯr, -lə-ˌsȯr, kə-ˈti-lə-\

Definition of cotylosaur 

: any of an order (Cotylosauria) of extinct primitive reptiles of the Carboniferous to Triassic with short legs and massive bodies that were prob. the earliest truly terrestrial vertebrate animals

First Known Use of cotylosaur

1895, in the meaning defined above

History and Etymology for cotylosaur

ultimately from Greek kotylē + sauros lizard

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The first known use of cotylosaur was in 1895

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