‖n.; pl. Cortices [ L., bark. Cf. Cork. ] 1. Bark, as of a tree; hence, an outer covering. [ 1913 Webster ]
2. (Med.) Bark; rind; specifically, cinchona bark. [ 1913 Webster ]
3. (Anat.) The outer or superficial part of an organ; as, the cortex or gray exterior substance of the brain. [ 1913 Webster ]