pelycosaur


pel·y·co·saur

noun \ˈpe-li-kə-ˌsr\

Definition of PELYCOSAUR

:  any of an order (Pelycosauria) of primitive chiefly Permian quadruped synapsid reptiles often having extreme development of the dorsal vertebral processes

Origin of PELYCOSAUR

ultimately from Greek pelyc-, pelyx bowl + sauros lizard
First Known Use: 1904

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