cortex

noun

cor·​tex ˈkȯr-ˌteks How to pronounce cortex (audio)
plural cortices ˈkȯr-tə-ˌsēz How to pronounce cortex (audio) also cortexes
1
a(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 cuticle
b
: the outer part of some organisms (such as paramecia)
2
: a plant bark or rind (such as cinchona) used medicinally
3
a
: 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 xylem
b
: an outer or investing layer of various algae, lichens, or fungi

Examples of cortex in a Sentence

Recent Examples on the Web Since Kristen’s brain is so scrambled there is a game of telephone between her ear drums and her frontal cortex, this is probably the director that everyone has been speculating Michelle is messing around with but Kristen interpreted it as an actor. Brian Moylan, Vulture, 7 May 2024 Watching the hand of someone of the same race being poked with a needle activates the anterior cingulate cortex, a region implicated in feelings of empathy; being shown the same with the hand of a person of another race produces less activation. Robert Sapolsky, Foreign Affairs, 12 Feb. 2019 Yet scientists have discovered animals possess structural equivalents to the human cortex, remarkable for its specialized neurons and patterns of connectivity that reveal the functions of both creating and responding to communication. T. Nelson Thompson, Baltimore Sun, 14 June 2024 In June 2021, a cancerous tumor was found in her adrenal cortex, the reason for her lingering left-side pain. Jessica Van Egeren, Journal Sentinel, 13 June 2024 See all Example Sentences for cortex 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'cortex.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

Latin cortic-, cortex bark — more at cuirass

First Known Use

circa 1676, in the meaning defined at sense 1a(1)

Time Traveler
The first known use of cortex was circa 1676

Dictionary Entries Near cortex

Cite this Entry

“Cortex.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cortex. Accessed 13 Jul. 2024.

Kids Definition

cortex

noun
cor·​tex ˈkȯr-ˌteks How to pronounce cortex (audio)
plural cortices ˈkȯrt-ə-ˌsēz How to pronounce cortex (audio) or cortexes
1
: an outer or surrounding layer of an organ or body part
the cortex of the kidney
especially : the outer layer of gray matter of the cerebrum
2
: the layer of tissue outside the xylem and phloem and inside the corky or epidermal tissues of a vascular plant
also : all tissues external to the xylem

Medical Definition

cortex

noun
cor·​tex ˈkȯr-ˌteks How to pronounce cortex (audio)
plural cortices ˈkȯrt-ə-ˌsēz How to pronounce cortex (audio) also cortexes
1
a
: the outer or superficial part of an organ or body structure (as the kidney, adrenal gland, or a hair)
especially : cerebral cortex
b
: the outer part of some organisms (as paramecia)
2
a
: a plant bark or rind (as cinchona) used medicinally
b
: the peel of any of several fruits
used especially in the writing of medical prescriptions

More from Merriam-Webster on cortex

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