sulcation noun3 •A channel or furrow. •Markings resembling channels or furrows, especially in shells, fossils, etc.[T]he presence of sulcation in the brow horns of all the Arrhinoceratops specimens known at the present time suggests a certain constancy in this genus. — 1946 •The development of or resulting formations of sulci in a brain cortex.Lissencephaly refers to a diffusely smooth-surfaced cerebral hemisphere without sulcation. — 2004 formssulcations
