cortical

from WordNet (r) 3.0 (2006)

cortical
    adj 1: of or relating to a cortex

from The Collaborative International Dictionary of English v.0.48

Cortical \Cor"ti*cal\ (k?r"t?-kal), a. [L. cortex bark: cf. F.
   cortical.]
   Belonging to, or consisting of, bark or rind; resembling bark
   or rind; external; outer; superficial; as, the cortical
   substance of the kidney.
   [1913 Webster] Corticate