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Pronunciation: sul'kus, sul'si


  1. One of the grooves or furrows on the surface of the brain, bounding the several convolutions or gyri; a fissure.
  2. Any long narrow groove, furrow, or slight depression.
  3. A groove or depression in the oral cavity or on the surface of a tooth.

[L. a furrow or ditch]

See Also: fissure

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.