AUTOCHTHONOUS Meaning of AUTOCHTHONOUS in English autochthonous BrE AmE ɔː ˈtɒk θ ə n əs AmE \ -ˈtɑːk- ɑː- ▷ autochthonous|ly li Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012