Source : Webster's Revised Unabridged Dictionary (1913)

Trident \Tri"dent\ (tr[imac]"dent), n. [L. tridens, -entis; tri-
   (see {Tri-}) + dens tooth: cf. F. trident. See {Tooth}.]
   1. (Class Myth.) A kind of scepter or spear with three
      prongs, -- the common attribute of Neptune.

   2. (Rom. Antiq.) A three-pronged spear or goad, used for
      urging horses; also, the weapon used by one class of
      gladiators.

   3. A three-pronged fish spear.

   4. (Geom.) A curve of third order, having three infinite
      branches in one direction and a fourth infinite branch in
      the opposite direction.

   {Trident bat} (Zo["o]l.), an Asiatic rhinolophid bat
      ({Tri[ae]nops Persicus}), having the nose membrane in the
      shape of a trident.