cortex

play
noun cor·tex \ˈkȯr-ˌteks\

Definition of cortex

plural

cortices

play \ˈkȯr-tə-ˌsēz\ or

cortexes

  1. 1a (1) :  the outer or superficial part of an organ or bodily structure (such as the kidney, adrenal gland, or cerebellum or a bone); especially :  cerebral cortex (2) :  the proteinaceous usually pigmented layer of a hair below the cuticleb :  the outer part of some organisms (such as paramecia)

  2. 2 :  a plant bark or rind (such as cinchona) used medicinally

  3. 3a :  the typically parenchymatous layer of tissue external to the vascular tissue and internal to the corky or epidermal tissues of a green plant; broadly :  all tissues external to the xylemb :  an outer or investing layer of various algae, lichens, or fungi

Recent Examples of cortex from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'cortex'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of cortex

Latin cortic-, cortex bark — more at cuirass


CORTEX Defined for English Language Learners

cortex

play
noun

Definition of cortex for English Language Learners

  • medical : the outer layer of an organ in the body and especially of the brain


Medical Dictionary

cortex

play
noun cor·tex \ˈkȯr-ˌteks\

Medical Definition of cortex

plural

cortices

\ˈkȯrt-ə-ˌsēz\play or

cortexes

  1. 1a:  the outer or superficial part of an organ or body structure (as the kidney, adrenal gland, or a hair); especially :  cerebral cortexb:  the outer part of some organisms (as paramecia)

  2. 2a:  a plant bark or rind (as cinchona) used medicinallyb:  the peel of any of several fruits—used especially in the writing of medical prescriptions

Illustration of cortex



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