Added 9 October 2026 autochthonal adjective Categories: Describing WordsObscure Words adjective ! Definition from WordNet 3.1, Princeton University. More about autochthonal at Wordnik → Where our words come from → Originating where it is found. the autochthonal fauna of Australia includes the kangaroo Related Words: autochthonicautochthonousindigenousnativeendemicallochthonicallochthonousaboriginalparautochthonousauthigenicaboriginaryoriginary Back to today's word