grey matter
Britishnoun
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Technical name: substantia grisea. the greyish tissue of the brain and spinal cord, containing nerve cell bodies, dendrites, and bare (unmyelinated) axons Compare white matter
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informal brains or intellect
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Among some participants, sleeping for fewer hours was associated with a faster decline in grey matter.
From Science Daily ● Jul. 31, 2026
"Our study shows that individuals carrying certain AQP4 variants showed faster grey matter loss when they reported shorter sleep," researcher Dr. Ayeisha Milligan Armstrong said.
From Science Daily ● Jul. 31, 2026
Deep within the grey matter is plumbing called the glymphatic system.
From BBC ● Jul. 19, 2026
A number of studies in teens have suggested a pattern of grey matter thinning through adolescence with a "refining or pruning" of nerve networks as brains mature.
From BBC ● Mar. 4, 2026
The middle peduncles form a large proportion of the white core, and their fibres terminate 395 in the grey matter of the foliated cortex of the hemispheres.
From Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 4 "Bradford, William" to "Brequigny, Louis" by Various
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