Cotylosaur Definition

kŏtl-ə-sôr
noun
Any of various large reptilelike extinct tetrapods of the Carboniferous and Permian Periods, traditionally placed in the order Cotylosauria.
American Heritage

Other Word Forms of Cotylosaur

Noun

Singular:
cotylosaur
Plural:
cotylosaurs

Origin of Cotylosaur

  • Greek kotulē hollow object, socket Greek sauros lizard

    From American Heritage Dictionary of the English Language, 5th Edition

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cotylosaur