|a deep cleft in each hemisphere of the brain separating the frontal lobe from the parietal lobe|
|a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.|
|a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.|
central sulcus n.
See fissure of Rolando.