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pertaining to autochthons; aboriginal; indigenous (opposed to heterochthonous).
Pathology.

found in the part of the body in which it originates, as a cancerous lesion.
found in a locality in which it originates, as an infectious disease.

Psychology. of or relating to ideas that arise independently of the individual’s own train of thought and seem instead to have some alien or external agency as their source.
Geology. (of rocks, minerals, etc.) formed in the region where found.
Compare allochthonous.
Historical Examples

Thrombi are also divided into primitive, or autochthonous, and secondary varieties.
A System of Practical Medicine by American Authors, Vol. I Various

Intentionally, and to a certain extent, Rimsky’s work is autochthonous.
Musical Portraits Paul Rosenfeld

Sometimes the cultural change was an autochthonous development.
A Book-Lover’s Holidays in the Open Theodore Roosevelt

Apparently from mother earth herself they had come, autochthonous.
Where the Trail Divides Will Lillibridge

It is not probable that the Eupatrid families were all autochthonous, even in the loose sense of that term.
Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 8 Various

If any of the autochthonous idlers asked him what he called himself, he replied shortly, “an engineer.”
Tess of the d’Urbervilles Thomas Hardy

Smilisca is an excellent example of an autochthonous Middle American genus.
Neotropical Hylid Frogs, Genus Smilisca William E. Duellman

Everything shows that the civilizations and religions of Mexico and Peru are autochthonous, springing from the soil itself.
Lectures on the Origin and Growth of Religion as Illustrated by the Native Religions of Mexico and Peru Albert Rville

The Egyptians, however, like the ancient Greeks, regarded themselves as autochthonous.
The World’s Progress, Vol. I (of X) Various

In both cases the Eastern region is vastly richer in genera and species, as well as in autochthonous forms, than the Western.
A Guide to the Study of Fishes, Volume 1 (of 2) David Starr Jordan

adjective
(of rocks, deposits, etc) found where they and their constituents were formed Compare allochthonous
inhabiting a place or region from earliest known times; aboriginal
(physiol) (of some functions, such as heartbeat) originating within an organ rather than from external stimulation
adj.

“native, indigenous,” 1845, from autochthon + -ous.

autochthonous au·toch·tho·nous (ô-tŏk’thə-nəs)
adj.

Native to the place inhabited; indigenous.

Originating in the place where found. Used of a disease originating in the part of the body where found, or of a disease acquired in the place where the patient is.