'pelycosaur' definitions:
Definition of 'pelycosaur'
From: WordNet
noun
Large primitive reptile having a tall spinal sail; of the Permian or late Paleozoic in Europe and North America
Definition of 'pelycosaur'
From: 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]