pelycosaur

English Thesaurus

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

hypernym	:	synapsid, synapsid reptile,
definition	:	extinct reptile having a single pair of lateral temporal openings in the skull (noun.animal)

member meronym	:	order pelycosauria, pelycosauria,
definition	:	edaphosaurus; dimetrodon (noun.animal)