gyrus

noun

gy·​rus ˈjī-rəs How to pronounce gyrus (audio)
plural gyri ˈjī-ˌrī How to pronounce gyrus (audio)
: a convoluted ridge between anatomical grooves
especially : convolution sense 2

Examples of gyrus in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Neurons in the dentate gyrus die off, and inflammation rises. — Big Think, 1 May 2026 There’s also a couple of areas that fall along the side of the middle temporal gyrus, this big hunk of meat that goes along the whole temporal lobe. — Quanta Magazine, 5 Dec. 2025 While studies have since recognized the phenomenon in humans — in a part of the hippocampus called the dentate gyrus — evidence has been mixed and the process poorly understood. — Lindsey Leake, NBC news, 26 Feb. 2026 People with positive parenting feelings exhibited more connectivity changes in parts of the brain that are important for self-control (the middle frontal gyrus) and empathy (the supramarginal gyrus). — Anthony Vaccaro, Scientific American, 29 Oct. 2025 See All Example Sentences for gyrus

Word History

Etymology

New Latin, from Latin, circle — more at gyre

First Known Use

circa 1842, in the meaning defined above

Time Traveler
The first known use of gyrus was circa 1842

Rhymes for gyrus

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Browse Nearby Words

gyrovague
gyrus
Gy Sgt
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Cite this Entry

“Gyrus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/gyrus. Accessed 7 Jul. 2026.

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Medical Definition

gyrus

noun
gy·​rus ˈjī-rəs How to pronounce gyrus (audio)
plural gyri -ˌrī How to pronounce gyrus (audio)
: a convoluted ridge between anatomical grooves
especially : convolution

More from Merriam-Webster on gyrus

Britannica.com: Encyclopedia article about gyrus

Last Updated: - Updated example sentences
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