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]

WordNet (r) 3.0 (2006):

cortex
    n 1: the layer of unmyelinated neurons (the grey matter) forming
         the cortex of the cerebrum [syn: cerebral cortex,
         cerebral mantle, pallium, cortex]
    2: the tissue forming the outer layer of an organ or structure
       in plant or animal [ant: medulla]
    3: the tissue that surrounds the lens nucleus [syn: lens
       cortex, cortex]

Moby Thesaurus II by Grady Ward, 1.0:

67 Moby Thesaurus words for "cortex":
   armature, armor, armor plate, bark, body armor, border, buckler,
   bulletproof vest, chain armor, chain mail, chitin, circumference,
   coat of mail, cork, covering, crust, elytron, envelope, epicarp,
   epidermis, episperm, exterior, external, facade, face, facet,
   fringe, front, habergeon, harness, hauberk, integument, lineaments,
   lorica, lorication, mail, needles, outer face, outer layer,
   outer side, outer skin, outline, outside, panoply, peel, peeling,
   pericarp, periphery, phellum, plate, plate armor,
   protective covering, rind, scute, scutum, shell, shield, skin,
   spines, suit of armor, superficies, superstratum, surface, test,
   testa, thick skin, top



The Free On-line Dictionary of Computing (30 December 2018):

Cortex

   An experimental slow controls project at CERN.

   (1994-11-30)