Trident
From BiblePortal Wikipedia
Webster's Dictionary [1]
(1): ( a.) Having three teeth or prongs; tridentate.
(2): ( n.) A three-pronged fish spear.
(3): ( n.) A kind of scepter or spear with three prongs, - the common attribute of Neptune.
(4): ( n.) A curve of third order, having three infinite branches in one direction and a fourth infinite branch in the opposite direction.
(5): ( n.) A three-pronged spear or goad, used for urging horses; also, the weapon used by one class of gladiators.
The Nuttall Encyclopedia [2]
Originally a three-pronged fork used by fishermen, and at length the symbol, in the hands of Poseidon and Britannia, of sovereignty over the sea.