The Collaborative International Dictionary of English v.0.48:

Trident \Tri"dent\, a. [L. tridens.]
   Having three teeth or prongs; tridentate.
   [1913 Webster] Tridentate

The Collaborative International Dictionary of English v.0.48:

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.
      [1913 Webster]

   2. (Rom. Antiq.) A three-pronged spear or goad, used for
      urging horses; also, the weapon used by one class of
      gladiators.
      [1913 Webster]

   3. A three-pronged fish spear.
      [1913 Webster]

   4. (Geom.) A curve of third order, having three infinite
      branches in one direction and a fourth infinite branch in
      the opposite direction.
      [1913 Webster]

   Trident bat (Zool.), an Asiatic rhinolophid bat (Triaenops
      Persicus), having the nose membrane in the shape of a
      trident.
      [1913 Webster]

WordNet (r) 3.0 (2006):

trident
    n 1: a spear with three prongs

Moby Thesaurus II by Grady Ward, 1.0:

86 Moby Thesaurus words for "trident":
   V, branch, clover, crotch, crutch, delta, deltoid, deuce-ace, fan,
   fork, furcula, furculum, groin, inguen, leash, offshoot, prong,
   ramification, set of three, shamrock, stem, tercet, ternary,
   ternion, terzetto, three, three-cornered, three-dimensional,
   three-footed, three-pronged, three-sided, threesome, tierce,
   trefoil, trey, triad, trialogue, triangle, triangular, triangulate,
   triarch, trichotomous, tricorn, tricornered, tricuspid, tridental,
   triennium, trifid, triflorate, triflorous, trifurcate, trigonal,
   trigonoid, trigrammatic, trihedral, trihedron, trilateral, trilogy,
   trimerous, trimester, trine, trinity, trinomial, trio, triparted,
   tripartite, triphthong, triple crown, triple threat, triplet,
   triplopy, tripod, tripodic, triptych, triquetral, triquetrous,
   trireme, trisected, triseme, triskelion, trisul, triumvirate,
   triunity, trivet, troika, wishbone



The Free On-line Dictionary of Computing (30 December 2018):

Trident

    A video card manufacturer.

   [More info?]

   (1997-07-16)