The Collaborative International Dictionary
Sulcation
Sulcation \Sul*ca"tion\, n. A channel or furrow.
Wiktionary
sulcation
n. 1 A channel or furrow. 2 marking resembling channels or furrows, especially in shells, fossils, etc. 3 (context neuroscience English) The development of or resulting formations of sulcus in a brain cortex.