sulcus

Definitions of sulcus
  1. noun
    (anatomy) any of the narrow grooves in an organ or tissue especially those that mark the convolutions on the surface of the brain
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    Rolando's fissure, central sulcus, fissure of Rolando, sulcus centralis
    a brain fissure extending upward on the lateral surface of both hemispheres; separates the frontal and parietal lobes
    Sylvian fissure, fissure of Sylvius, lateral cerebral sulcus, sulcus lateralis cerebri
    the deepest and most prominent of the cortical fissures; separates the frontal lobes and temporal lobes in both hemispheres
    parieto-occipital fissure, parieto-occipital sulcus
    a sulcus near the posterior end of each hemisphere that separates the parietal lobes and the occipital lobes in both hemispheres
    calcarine fissure, calcarine sulcus
    a sulcus in the mesial surface of the occipital lobe of the cerebrum
    type of:
    fissure
    (anatomy) a long narrow slit or groove that divides an organ into lobes
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