pelycosaur | sense examples, Usage and Definition from wordnet dictionary online

Noun pelycosaur has 1 sense

pelycosaur - large primitive reptile having a tall spinal sail; of the Permian or late Paleozoic in Europe and North America
--₁ is a kind of synapsid, synapsid reptile
--₁ is a member of Pelycosauria, order Pelycosauria

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