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]