Adjective autochthonic has 1 sense
  1. autochthonal, autochthonic, autochthonous, endemic, indigenous - originating where it is found; "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"
    Antonym: foreign (indirect, via native)
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