'Cortex' definitions:

Definition of 'cortex'

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

Definition of 'Cortex'

From: GCIDE
  • 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]