synapsid reptile

Definitions of synapsid reptile

1. noun

   extinct reptile having a single pair of lateral temporal openings in the skull
   synonyms: synapsid

   types:

   protomammal, therapsid

   probably warm-blooded; considered direct ancestor of mammals

   ictodosaur

   intermediate in form between the therapsids and most primitive true mammals

   pelycosaur

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

   edaphosaurus

   heavy-bodied reptile with a dorsal sail or crest; of the late Paleozoic

   dimetrodon

   carnivorous dinosaur of the Permian in North America having a crest or dorsal sail

   Chronoperates paradoxus

   shrew-sized protomammal from the Alberta region of Canada; from about 55 million years ago (much more recent than other mammal-like reptiles)

   cynodont

   small carnivorous reptiles

   dicynodont

   a kind of therapsid

   type of:

   reptile, reptilian

   any cold-blooded vertebrate of the class Reptilia including tortoises, turtles, snakes, lizards, alligators, crocodiles, and extinct forms