trident

A long, three-pronged fork or weapon, especially a three-pronged spear used for fishing.

The three-pronged spear carried by Neptune or Poseidon.

Having three teeth, prongs, or similar protrusions.

Any instrument of the form of a fork with three prongs; specifically, a three-pronged fish-spear.

A spear with three prongs, usually barb-pointed, forming a characteristic attribute of Poseidon (Neptune), the sea-god. See also cut under Poseidon.