WordWeb Online

1. Originating where it is found
   "the Ainu are indigenous to the northernmost islands of Japan";
   - autochthonal, autochthonic, autochthonous, endemic, desi [Asia]
    
2. Characteristic of or relating to people inhabiting a region from the beginning
   "indigenous Americans";
   - native, aboriginal
    
3. Present at birth but not necessarily hereditary; acquired during foetal development
   - congenital, inborn, innate

See also: native, nonheritable, noninheritable

Encyclopedia: Indigenous Indigenous, minority and lesser-used languages