Medical Definition of autochthonous
1a: indigenous or endemic to a region <autochthonous malaria>b: contracted in the area where reported <autochthonous cases of malaria in the United States>
2: originated in that part of the body where found—used chiefly of pathological conditions
Seen and Heard
What made you want to look up autochthonous? Please tell us where you read or heard it (including the quote, if possible).