(adj) originating where it is found, Syn. autochthonic, autochthonous, indigenous, endemic, Example: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
n.; pl. E. Authochthons L. Autochthones [ L., fr. Gr. &unr_;, pl. &unr_;, from the land itself; a'yto`s self + &unr_; earth, land. ] 1. One who is supposed to rise or spring from the ground or the soil he inhabits; one of the original inhabitants or aborigines; a native; -- commonly in the plural. This title was assumed by the ancient Greeks, particularly the Athenians. [ 1913 Webster ]
2. That which is original to a particular country, or which had there its origin. [ 1913 Webster ]