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Noun sulcus has 1 sense
  1. sulcus - (anatomy) any of the narrow grooves in an organ or tissue especially those that mark the convolutions on the surface of the brain
    --1 is a kind of     fissure
    --1 has particulars:
     fissure of Rolando, Rolando's fissure, central sulcus, sulcus centralis; fissure of Sylvius, Sylvian fissure, lateral cerebral sulcus, sulcus lateralis cerebri; parieto-occipital sulcus, parieto-occipital fissure; calcarine sulcus, calcarine fissure
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