Pronunciation: (kôr'teks),[key] —n., —pl.-ti•cesPronunciation: (-tu-sēz").[key] 1. Anat.,Zool. a. the outer region of an organ or structure, as the outer portion of the kidney.
b. the cerebral cortex.
2. Bot. a. the portion of a stem between the epidermis and the vascular tissue; bark.
b. any outer layer, as rind.
3. Mycol.the surface tissue layer of a fungus or lichen, composed of massed hyphal cells.