gyrus

noun

gy·​rus ˈjī-rəs 

plural gyri ˈjī-ˌrī 

: a convoluted ridge between anatomical grooves

especially : convolution sense 2

Examples of gyrus in a Sentence

Recent Examples on the Web

Brain MRIs also found an increase in the surface area of the inferior frontal gyrus in the MIND diet group. — Samantha Agate, Miami Herald, 25 July 2026

Neurons in the dentate gyrus die off, and inflammation rises. — Big Think, 1 May 2026

Wiseman hypothesized that stronger magnetic fields may affect the brain, similar to how electrical stimulation of the angular gyrus can make one feel as if there is another person standing behind, mimicking one’s movements. — ArsTechnica, 27 Apr. 2026

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

Word History

Etymology

New Latin, from Latin, circle — more at gyre

First Known Use

circa 1842, in the meaning defined above

Rhymes for gyrus

• iris
• virus
• adenovirus
• baculovirus
• coronavirus
• enterovirus
• poliovirus
• antivirus
• herpesvirus
• parvovirus
• reovirus
• retrovirus

Medical Definition

gyrus

noun

gy·​rus ˈjī-rəs 

plural gyri -ˌrī 

: a convoluted ridge between anatomical grooves

especially : convolution