[ aw-tok-thuh n ]
/ ɔˈtɒk θən /

noun, plural au·toch·thons, au·toch·tho·nes [aw-tok-thuh-neez] /ɔˈtɒk θəˌniz/.

an aboriginal inhabitant.
Ecology. one of the indigenous animals or plants of a region.
Geology. a geological formation formed in the region where found.
Compare allochthon.

Origin of autochthon

1640–50; < Greek autóchthōn of the land itself, equivalent to auto- auto-1 + chthṓn the earth, land, ground Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for autochthon

British Dictionary definitions for autochthon

/ (ɔːˈtɒkθən, -θɒn) /

noun plural -thons or -thones (-θəˌniːz)

(often plural) one of the earliest known inhabitants of any country; aboriginal
an animal or plant that is native to a particular region

Word Origin for autochthon

C17: from Greek autokhthōn from the earth itself, from auto- + khthōn the earth
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012