cortex

/หˆkษ”หtษ›ks/

IPA: /K AO1 R T EH0 K S/

noun
  1. 1

    The outer layer of an internal organ or body structure, such as the kidney or the brain.

  2. 2

    The tissue of a stem or root that lies inward from the epidermis, but exterior to the vascular tissue.

Source: https://en.wiktionary.org/wiki/cortex