Sulcus
WordNet

noun


(1)   (anatomy) any of the narrow grooves in an organ or tissue especially those that mark the convolutions on the surface of the brain
WiktionaryText

Noun


  1. a furrow or groove in an organ or a tissue
  2. any of the grooves that mark the convolutions of the surface of the brain
  3. subparallel grooves and ditches formed by geological processes
 
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