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cortex

nounattested in dialogue

  • United Kingdom//ˈkɔːtɛks//
  • United States//ˈkɔɹtɛks//

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

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.

  3. 3

    The outer surface of a piece of flint.

Etymology

Etymology tree Proto-Indo-European *(s)ker- Proto-Indo-European *(s)kert- Proto-Indo-European *(s)kort-ek-sder. Latin cortexbor. English cortex Borrowed from Latin cortex (“cork, bark”).

Forms

plural
cortexes, cortices
The neighbouring pagesAlphabetical order follows the rules of the language, not byte values: an accent decides only between two otherwise identical words, and Spanish files Ñ as a letter of its own.

Lexical content from Wiktionary, under CC BY-SA 4.0 · Source entry · Data version 2026-08-23

Rank among the words of the OpenSubtitles 2018 corpus — film and television subtitles, so spoken rather than written usage (CC BY-SA 3.0).