Originating or occurring naturally in a particular place; indigenous. The autochthonous plants of the region have adapted to the local climate over centuries.
Relating to an inhabitant of a place who is native to it. The autochthonous population has a deep connection to the land and its traditions.
(Geology) Formed or occurring in its present position; not transported from elsewhere. The autochthonous sandstone indicates that the sediments were deposited on site.