plural noun
Ed·​a·​pho·​sau·​ria | \ ˌedəfōˈsȯrēə\

Definition of Edaphosauria 

: a suborder of Pelycosauria that includes Edaphosauridae and certain related families of extinct reptiles — compare edaphosaurus

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History and Etymology for Edaphosauria

New Latin, from Greek edaphos bottom, ground, soil + New Latin -sauria

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