Cortices

from The Collaborative International Dictionary of English v.0.48

Cortex \Cor"tex\ (k[^o]r"t[e^]ks), n.; pl. {Cortices} (-t?-s?z).
   [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]