First Known Use: 1904
Dictionary
pelycosaur
noun pel·y·co·saur \ˈpe-li-kə-ˌsȯr\
Definition of PELYCOSAUR
: any of an order (Pelycosauria) of primitive chiefly Permian quadruped synapsid reptiles often having extreme development of the dorsal vertebral processes
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Origin of PELYCOSAUR
ultimately from Greek pelyc-, pelyx bowl + sauros lizard
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