1. originating or occurring naturally in a particular place; native or indigenous
Usage: formal; often used in geology, biology, and anthropology
2. relating to or denoting the original inhabitants of a region
Usage: formal; anthropological context

Examples

• The autochthonous plants of the island have adapted to its unique climate over thousands of years.
• Geologists study autochthonous rock formations to understand the region's geological history.
• The autochthonous peoples of Australia developed rich cultural traditions long before European contact.
• These autochthonous fish species are found nowhere else in the world.
• The museum exhibits showcase the autochthonous art and crafts of the local indigenous community.
• Autochthonous forests in the Amazon contain species that have never been scientifically documented.