edaphosaurus

== English == === Etymology === From Ancient Greek ἔδαφος (édaphos, “ground, soil”) +‎ -saurus. By surface analysis, edapho- +‎ -saurus. === Noun === edaphosaurus Any of several synapsids of the genus Edaphosaurus, from the Carboniferous and Permian periods, that had a distinctive dorsal sail or crest. ==== Derived terms ====