Definition of gyrus in English:

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Pronunciation: /ˈjīrəs/

noun (plural gyri /ˈjīrī/)

A ridge or fold between two clefts on the cerebral surface in the brain.
Example sentences
  • The cerebellum has on its surface a series of tight folds, called folia, similar to, but narrower than, the gyri of the cerebral cortex.
  • A comparison of the brain scans from the two groups revealed significant differences in the volume of gray matter in areas of the frontal and temporal lobes and the cingulate gyrus.
  • On each side, the gyrus rectus of the frontal lobe is well developed and the orbital gyri are arranged irregularly around the H-shaped orbital sulci.


Mid 19th century: from Latin, from Greek guros 'a ring'.

For editors and proofreaders

Syllabification: gy·rus

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