Where does “exocortex” come from?

exocortex (English) comes from Romanian cortex, from French cortex, from Latin cortex, from Proto-Indo-European *(s)kort-ek-s.

exocortex (English): A hypothetical artificial information-processing...

Definitions

Step	Language	Word	Meaning
1	Romanian	cortex	—
2	French	cortex	cortex
3	Latin	cortex	The bark of a tree; the bark of a cork tree;...
4	Proto-Indo-European	*(s)kort-ek-s	—

exocortex — Etymology, Origin & Word History | Etymology Explorer