Cor"tex (k?r"t?ks), n.; pl. Cortices (-t-sz). [L., bark. Cf. Cork.]
1.
Bark, as of a tree; hence, an outer covering.
2. Med.
Bark; rind; specifically, cinchona bark.
3. Anat.
The outer or superficial part of an organ; as, the cortex or gray exterior substance of the brain.
© Webster 1913.