adj.
Pronunciation: o ̇ - ' täk-th ə -n ə s
Function: adjective
Date: 1805
1 : INDIGENOUS , NATIVE <an autochthonous people>
2 : formed or originating in the place where found < autochthonous rock> <an autochthonous infection>
– au · toch · tho · nous · ly adverb