originating where it is found - the autochthonal fauna of Australia includes the kangaroo - autochthonous rocks and people and folktales - endemic folkways - the Ainu are indigenous to the northernmost islands of Japan • Syn: autochthonic, autochthonous, endemic, indigenous • Similar to: native • Derivationally related forms: indigenousness (for: indigenous), autochthony (for: autochthonic)