adjective. Originating or formed in the place where found; indigenous: synonym: native.

adjective. Native to or produced within a system.

Pertaining to autochthons; indigenous; sprung from the soil; aboriginal.

In pathology, not extraneous; originating at the place where found.

In petrol., noting rocks which have originated in situ, such as peat, rock-salt, and stalagmitic limestone; also applied to constituent minerals of rocks which have crystallized in the place they now occupy. Autochthonous materials are contrasted with the mechanically derived particles of clastic rocks.

adjective. Native to the place where found; indigenous.

adjective. Originating where found.

adjective. Buried in place, especially of a fossil preserved in its life position without disturbance or disarticulation.

adjective. of rocks, deposits, etc.; found where they and their constituents were formed

adjective. originating where it is found

"But it was 14-year-old David Tidmarsh of South Bend, Indiana who spelled the final word autochthonous to become this year's champion."

native  

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abecedarian  aboriginal  ancestral  antenatal  antepatriarchal