Definition of cotylosaur in English:

cotylosaur

noun

  • A member of the extinct order Cotylosauria of primitive reptiles, chiefly of the Permian and Triassic periods, which were characterized by short limbs and a rather high, narrow, unfenestrated skull.

Origin

Late 19th century; earliest use found in The Century Illustrated Monthly Magazine. From scientific Latin Cotylosauria, order name: see -saur.

Pronunciation

cotylosaur

/kəˈtʌɪləsɔː/