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cortex

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cor⋅tex

  [kawr-teks]
Use cortex in a Sentence
–noun, plural -ti⋅ces  [-tuh-seez] .
1. Anatomy, Zoology.
a. the outer region of an organ or structure, as the outer portion of the kidney.
b. the cerebral cortex.
2. Botany.
a. the portion of a stem between the epidermis and the vascular tissue; bark.
b. any outer layer, as rind.
3. Mycology. the surface tissue layer of a fungus or lichen, composed of massed hyphal cells.
Origin:
1650–60; < L: bark, rind, shell, husk
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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cor·tex   (kôr'těks')   
n.   pl. cor·ti·ces (-tĭ-sēz') or cor·tex·es

  1. Anatomy

    1. The outer layer of an internal organ or body structure, as of the kidney or adrenal gland.

    2. The outer layer of gray matter that covers the surface of the cerebral hemisphere.

  2. Botany The region of tissue in a root or stem lying between the epidermis and the vascular tissue.

  3. An external layer, such as bark or rind.


[Latin, bark; see sker-1 in Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

cortex 
1653, from L. "bark of a tree." Specifically of the brain, first recorded 1741.
Online Etymology Dictionary, © 2001 Douglas Harper
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Medical Dictionary

Main Entry: cor·tex
Pronunciation: 'kor-"teks
Function: noun
Inflected Form: plural cor·ti·ces /'kort-&-"sEz/ or cor·tex·es
1 a : the outer or superficial part of an organ or body structure (as the kidney, adrenal gland, or a hair); especially : the outer layer of gray matter of the cerebrum and cerebellum b : the outer part of some organisms (as paramecia)
2 a : a plant bark or rind (as cinchona) usedmedicinally b : the peel of any of several fruits —used especially in the writing of medical prescriptions
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

cortex cor·tex (kôr'těks')
n. pl. cor·tex·es or cor·ti·ces (-tĭ-sēz')

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

  2. The cerebral cortex.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Science Dictionary
cortex   (kôr'těks')  Pronunciation Key 

  1. The outer layer of an organ or body part, such as the cerebrum or the adrenal glands.

  2. The region of tissue lying between the epidermis (the outermost layer) and the vascular tissue in the roots and stems of plants. It is composed of collenchyma, parenchyma, and sclerenchyma. In roots the cortex transfers water and minerals from the epidermis to the vascular tissue, which distributes them to other parts of the plant. The cortex also provides structural support and stores food manufactured in the leaves. See illustration at xylem.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Computing Dictionary

Cortex
An experimental slow controls project at CERN.
(1994-11-30)

The Free On-line Dictionary of Computing, © 1993-2007 Denis Howe
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