D defs.my
Entry 1 sense Webster, 1913

Cortical

/(k?r"t?-kal)/ · Cor·ti·cal · IPA /ˈkɔɹ.tɪ.kəl/
01 a. Belonging to, or consisting of, bark or rind; resembling bark or rind; external; outer; superficial; as, the cortical substance of the kidney.
  1. 1.
    Belonging to, or consisting of, bark or rind; resembling bark or rind; external; outer; superficial; as, the cortical substance of the kidney.