cortex

US /ˈkɔrˌteks/

UK /'kɔ:teks/

C1
n. (c./u.)Noun (Countable/Uncountable)The outer part of an organ/structure, e.g. brain
The cortex protects the rest of the brain
n. (c./u.)Noun (Countable/Uncountable)The outer layer of the cerebrum (the cerebral cortex), other organs, or a plant.
The cerebral cortex is the outer layer of the brain responsible for higher cognitive functions.
n. (c./u.)Noun (Countable/Uncountable)The outer layer of tissue immediately below the epidermis of a stem or root.
The cortex of the plant stem provides support and protection.
n. (c./u.)Noun (Countable/Uncountable)The outer layer of an organ, such as the adrenal gland or kidney.
The adrenal cortex produces important hormones.

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