Definition of sulcus in English:

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Pronunciation: /ˈsəlkəs/

noun (plural sulci /ˈsəlˌsī/ /-ˌsē/)

A groove or furrow, especially one on the surface of the brain.
Example sentences
  • Common findings on brain imaging include enlarged ventricles, widened cortical sulci, and cerebral, cerebellar, or brain stem atrophy.
  • Cortical tubers, or benign potato-like growths, appear along the gyri and sulci in the brain.
  • Conversion of the obturator sulcus into a bony foramen has been reported.


Mid 17th century: from Latin, 'furrow, wrinkle'.

For editors and proofreaders

Syllabification: sul·cus

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