Definition of edaphosaur in English:


(also edaphosaurus)

Pronunciation /ˈedəfōsôr/ /ˈɛdəfoʊsɔr/


  • 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

    ‘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.’


Modern Latin, from Greek edaphos ‘floor’ + sauros ‘lizard’.