fos·so·ri·al \(ˈ)fä|sōrēəl, -sȯr- also (ˈ)fȯ|-\adjective orfos·so·ri·ous\-ēəs\ Etymology: Medieval Latin fossorius adapted to digging (from Latin fossus + -orius -ory) + English -al or -ous : adapted to digging < a fossorial foot > < a fossorial mammal > — opposed to cursorial