1
[ adjective ] originating where it is found

Examples

"the autochthonal fauna of Australia includes the kangaroo" "autochthonous rocks and people and folktales" "endemic folkways" "the Ainu are indigenous to the northernmost islands of Japan"

Related terms

native

2
[ adjective ] of rocks, deposits, etc.; found where they and their constituents were formed

Related terms

allochthonous

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