Trisulc
Trisulc Tri"sulc (tr[imac]"s[u^]lk), n. [L. trisulcus; tri-
(see {Tri-}) + sulcus a furrow.]
Something having three forks or prongs, as a trident. [Obs.]
``Jupiter's trisulc.'' --Sir T. Browne.
[1913 Webster]
The Collaborative International Dictionary of English.
2000.