pelycosaur

pelycosaur
/pel"i keuh sawr'/, n.
any of a group of large primitive reptiles belonging to the extinct order Pelycosauria, abundant in North America and Europe during the Permian Period, often having a tall spinal sail.
[ < NL Pelycosauria (1878), equiv. to Gk pelyk-, s. of pélyx wooden bowl, cup (taken as meaning PELVIS, parallel to the NL sense of L pelvis) + -o- -O- + saûr(os) -SAUR + NL -ia -IA; so named from the peculiar form of the ischium in such reptiles]

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Universalium. 2010.

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  • pelycosaur — noun Etymology: ultimately from Greek pelyc , pelyx bowl + sauros lizard Date: 1904 any of an order (Pelycosauria) of primitive chiefly Permian quadruped synapsid reptiles often having extreme development of the dorsal vertebral processes …   New Collegiate Dictionary

  • pelycosaur — [ pɛlɪkəsɔ:] noun a fossil reptile of the late Carboniferous and Permian periods, typically having a spiny sail like crest on the back. Origin early 20th cent.: from Gk pelux, peluk bowl + sauros lizard …   English new terms dictionary

  • pelycosaur — pel·y·co·saur …   English syllables

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  • Evolution of mammals — Restoration of Thrinaxodon, a member of the cynodont group, which includes the ancestors of mammals Further information: Evolutionary history of life The evolution of mammals within the synapsid lineage (sometimes called mammal like reptiles )… …   Wikipedia

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