Pelycosaur Definition
pĕlĭ-kə-sôr
noun
Any of various extinct, chiefly carnivorous synapsids of the Carboniferous and Permian Periods, including the dimetrodon and other species with saillike structures along the back.
American Heritage
Origin of Pelycosaur
New Latin Pelycosauria name of the former suborder in which the various pelycosaurs were classified Greek pelux, peluk- bowl, cup (from the typical shape of the ischium) Greek sauros lizard
From American Heritage Dictionary of the English Language, 5th Edition
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