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.
There will be a small amount of fluctuation in every person's grey matter over time, but these results with a dip of nearly 5% are unexpected, Carmona says.
From BBC ● Mar. 4, 2026
One of the areas of grey matter with the most pronounced and persistent changes was the so-called default mode network - which is involved in self-perception, empathy and altruism.
From BBC ● Mar. 4, 2026
They examined grey matter, which consists of neuron cell bodies and is often described as the brain’s “thinking” tissue.
From Science Daily ● Feb. 19, 2026
Brain imaging revealed that women who were post-menopause showed significant reductions in grey matter volume, regardless of whether they had used HRT.
From Science Daily ● Feb. 7, 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
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
