sulcationrare.|sʌlˈkeɪʃən| [f. L. sulcāre sulcate v.: see -ation.] 1. Furrowing, grooving. 1658Phillips, Sulcation, a making furrows. 2. A sulcus or set of sulci. 1852Dana Crust. ii. 856 The sculpturing of the male being represented in the female by merely a few faint sulcations.