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 i...
