D defs.my
Entry 3 senses Webster, 1913

Cortex

/(kôr"tĕks)/ · Cor·tex · IPA /ˈkɔɹtɛks/
01 n. Bark, as of a tree; hence, an outer covering.
pl. Cortices ((-t�-s�z))
  1. 1.
    Bark, as of a tree; hence, an outer covering.
  2. 2.
    Bark; rind; specifically, cinchona bark.(Med.)
  3. 3.
    The outer or superficial part of an organ; as, the cortex or gray exterior substance of the brain.(Anat.)