Sulcus

n.

1.

A furrow; a groove; a fissure.

Noun

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

anatomy, calcarine fissure, calcarine sulcus, central sulcus, fissure, fissure of Rolando, fissure of Sylvius, general anatomy, lateral cerebral sulcus, parieto-occipital fissure, parieto-occipital sulcus, Rolando's fissure, sulcus centralis, sulcus lateralis cerebri, Sylvian fissure