1. The tissue forming the outer layer of an organ or structure in plant or animal
   "The renal cortex is the outer portion of the kidney where filtration occurs"
    
2. The layer of unmyelinated neurons (the grey matter) forming the cortex of the cerebrum
   "The cerebral cortex is responsible for higher-order thinking and processing sensory information";
   - cerebral cortex, cerebral mantle, pallium
    
3. The tissue that surrounds the lens nucleus
   "The lens cortex contains fibre cells that contribute to the lens's flexibility";
   - lens cortex

Derived forms: cortices, cortexes

Type of: animal tissue, neural structure, plant tissue

Antonym: medulla

Part of: cerebrum, crystalline lens, lens, lens of the eye

Encyclopedia: Cortex