1. (adj)autochthonous of rocks, deposits, etc.; found where they and their constituents were formed Synonyms: endemic, autochthonic, autochthonal, indigenous Antonyms: allochthonous, foreign, strange
2. (adj)autochthonal, autochthonic, autochthonous, endemic, indigenous originating where it is found Synonyms: endemical, autochthonous, autochthonic, autochthonal, endemic, indigenous Antonyms: allochthonous, foreign, strange
Synonyms and Antonyms of autochthonous 
