S0872700 (sŭl′kəs)n.pl.sul·ci(-kī, -sī)1. A deep, narrow furrow or groove, as in an organ or tissue.2. Any of the narrow fissures separating adjacent convolutions of the brain.[Latin.]sul′cal adj.
sulcal
(ˈsʌlkəl) adjof or pertaining to a sulcusEncyclopediaSeesulcus