資料來源 : Webster's Revised Unabridged Dictionary (1913)

Trisuls \Tri"suls\, 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.