autochthonic,a.|ɔːtɒkˈθɒnɪk| [f. as prec. + -ic.] Native to the soil, aboriginal, indigenous. 1845Ford Handbk. Spain i. 52 The old autochthonic Iberians.1860Abp. Thomson Outl. Laws Th. 285 To consider both Greek and Indian philosophy as autochthonic.