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Definition of «Cortex»

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Cortex: The outer portion of an organ.

The outer portion of the adrenal gland is called the adrenal cortex; the outer portion of the cerebrum is the cerebral cortex (a key part of the brain); the outer part of the kidney is the renal cortex (it lies just beneath the capsule surrounding the kidney); etc.

The cortex is in contrast to the inner portion of the organ which is called the medulla. Thus, there is the adrenal medulla; the medulla oblongata of the brain; the renal medulla; etc.

The word "cortex" is Latin for the bark of a tree. The plural of cortex is cortices. The adjective is cortical.

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  • cortex - definition of cortex by the Free Online Dictionary ...

    cor·tex (kôr t ks) n. pl. cor·ti·ces (-t-s z) or cor·tex·es. 1. Anatomy. a. The outer layer of an internal organ or body structure, as of the kidney or adrenal ...

  • Cortex | Define Cortex at Dictionary.com

    noun, plural -ti·ces . 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 ...

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