Trident

Definition:

(n.) A kind of scepter or spear with three prongs, -- the common attribute of Neptune.
(n.) A three-pronged spear or goad, used for urging horses; also, the weapon used by one class of gladiators.
(n.) A three-pronged fish spear.
(n.) A curve of third order, having three infinite branches in one direction and a fourth infinite branch in the opposite direction.
(a.) Having three teeth or prongs; tridentate.

Compare trident with other words:

rident vs. trident