1. A kind of scepter or spear with three prongs, the common attribute of neptune.
2. 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. (Science: geometry) A curve of third order, having three infinite branches in the direction and a fourth infinite branch in the opposite direction.
(Science: zoology) Trident bat, an Asiatic rhinolophid bat (Triaenops Persicus), having the nose membrane in the shape of a trident.
Origin: L. Tridens, -entis; tri- (see Tri-) _ dens tooth: cf. F. Trident. See Tooth.