Pelycosaur

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  pelycosaur \pelycosaur\ n.
     1. A large primitive reptile having a tall spinal sail; of
        the Permian or late Paleozoic in Europe and North America.
        [WordNet 1.5]

From WordNet (r) 2.0 [wn]:



  pelycosaur
       n : large primitive reptile having a tall spinal sail; of the
           Permian or late Paleozoic in Europe and North America