Dictionary:

cortical

  (kôr'tĭ-kəl)

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1. Of, relating to, derived from, or consisting of cortex.
2. Of, relating to, associated with, or depending on the cerebral cortex.

1. Of, relating to, derived from, or consisting of cortex.
2. Of, relating to, associated with, or depending on the cerebral cortex.

Pertaining to or emanating from a cortex, usually bone, cerebral or adrenal.

• c. epilepsy — see partial seizure.
• c. hyperplasia — caused by chronic stimulation of the adrenal cortex by ACTH.
• c. necrosis — see polioencephalomalacia.
• c. sinus — vascular sinuses in the cortex of a lymph node.

The adjective has one meaning:

Meaning #1: of or relating to a cortex
  Pertains to noun: cortex (meaning #2)