Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun pelycosaur

1 sense of pelycosaur

Sense 1
pelycosaur -- (large primitive reptile having a tall spinal sail; of the Permian or late Paleozoic in Europe and North America)
       => synapsid, synapsid reptile -- (extinct reptile having a single pair of lateral temporal openings in the skull)