Search Result for "pelycosaur": 
Wordnet 3.0

NOUN (1)

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



The Collaborative International Dictionary of English v.0.48:

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]


WordNet (r) 3.0 (2006):

pelycosaur
    n 1: large primitive reptile having a tall spinal sail; of the
         Permian or late Paleozoic in Europe and North America