·noun A furrow; a groove; a fissure.
sulcus, a, um, adj., only ficus sulca, an unknown species of fig-tree , Col. 5, 10, 11. ...
A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
sulcus ī, m cf. ὁλκός, a furrow : altius impressus: sulcum patefacere aratro, O.: sulcis committer...
An Elementary Latin Dictionary