Definition of Cortex

1. Noun. The layer of unmyelinated neurons (the grey matter) forming the cortex of the cerebrum.

2. Noun. The tissue forming the outer layer of an organ or structure in plant or animal.
Generic synonyms: Animal Tissue, Plant Tissue
Specialized synonyms: Adrenal Cortex, Renal Cortex
Derivative terms: Cortical
Antonyms: Medulla

3. Noun. The tissue that surrounds the lens nucleus.
Exact synonyms: Lens Cortex
Generic synonyms: Animal Tissue
Group relationships: Crystalline Lens, Lens, Lens Of The Eye

Definition of Cortex

1. n. Bark, as of a tree; hence, an outer covering.

Definition of Cortex

1. Noun. (context: countable anatomy) The outer layer of an internal organ or body structure, such as the kidney or the brain. ¹

2. Noun. (context: uncountable botany) The tissue of a stem or root that lies inward from the epidermis, but exterior to the vascular tissue. ¹

¹ Source:

Definition of Cortex

1. the outer layer of an organ [n -TICES or -TEXES] : CORTICAL [adj]

Medical Definition of Cortex

1. The outer layer of an organ or other body structure, as distinguished from the internal substance. Origin: L. Corticalis = bark, rind, shell This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)

Lexicographical Neighbors of Cortex

cortex (current term)
cortex cerebelli
cortex cerebri
cortex glandulae suprarenalis
cortex lentis
cortex nodi lymphatici
cortex of hair shaft
cortex of lens
cortex of lymph node
cortex of ovary
cortex of thymus
cortex ovarii
cortex renis

Literary usage of Cortex

Below you will find example usage of this term as found in modern and/or classical literature:

1. Anatomy, Descriptive and Surgical: Descriptive and Surgical by Henry Gray (1897)
"These plexuses appear to the naked eye as two fine white lines (Baillarger) in sections of the cortex of a fresh brain. Special Types of the Gray Matter of ..."

2. A Text-book of Physiology: For Medical Students and Physicians by William Henry Howell (1907)
"The cortical center for distinct vision according to this view is not limited to a narrow area, but must involve a large region in the occipital cortex. ..."

3. The Anatomy of the Nervous System by Stephen Walter Ranson (1920)
"CHAPTER XVIII THE cortex AND MEDULLARY CENTER OF THE CEREBRAL HEMISPHERE THE cerebral cortex forms a convoluted gray lamina, covering the cerebral ..."

4. Science by American Association for the Advancement of Science (1883)
"Eight seconds of simultaneous data taken from a cat, during an epileptic seizure, from (top to bottom) the septal area, piriform cortex, ..."

5. Psychology: General Introduction by Charles Hubbard Judd (1907)
"The cortex may be divided into three kinds of areas or centers; ... These figures represent portions of the cerebral cortex from two areas of the human ..."

6. Proceedings of the Royal Society of London by Royal Society (Great Britain) (1901)
"(b) Subdivision of this variety of cortex into layers. (f) The modifications caused in (a) and (b) by long-standing blindness. Examination of the literature ..."

7. A Text-book of Physiology for Medical Students and Physicians by William Henry Howell (1905)
"commissural and connect portions of the cortex of one hemisphere with the cortex of the other side. This relation is indicated in the accompanying diagram ..."

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