Definition of edaphosaur in English:

Share this entry


Pronunciation: /ˈedəfōsôr/
(also edaphosaurus /-ˈsôrəs/)


A large herbivorous synapsid reptile of the late Carboniferous and early Permian periods, with long knobbly spines on its back supporting a sail-like crest.
  • Genus Edaphosaurus, order Pelycosuria, subclass Synapsida.
Example sentences
  • Along with the Diadectidae, Edaphosaurus is one of the earliest known plant-eating tetrapods (land-living vertebrates).
  • Other Edaphosauruses were not so large and some were half a meter or less in length.



Example sentences
  • The skull is edaphosaurian in its general outline and in its small size in proportion to allover body size.
  • The first herbivorous land vertebrates were large (3 to 4 m long) diadectid brachiosaur amphibians and edaphosaurian pelycosaur reptiles.


Modern Latin, from Greek edaphos 'floor' + sauros 'lizard'.

For editors and proofreaders

Syllabification: ed·a·pho·saur

Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.