The Collaborative International Dictionary of English v.0.48:
Sulcate \Sul"cate\, Sulcated \Sul"ca*ted\, a. [L. sulcatus, p. p. of sulcare to furrow, fr. sulcus a furrow.] Scored with deep and regular furrows; furrowed or grooved; as, a sulcated stem. [1913 Webster]WordNet (r) 3.0 (2006):
sulcate adj 1: having deep narrow furrows or grooves