A trident /ˈtraɪdənt/ is a three-pronged spear. It is used for spear fishing and historically as a polearm.
The trident is the weapon of Poseidon (Greek) or ...
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Neptune (Roman), the god of the sea in classical mythology. Other sea deities such as Amphitrite or Triton were also often depicted with a trident in classical art. Later, tridents were used in medieval heraldry, sometimes held by a merman or triton. In Hinduism, it is the weapon of Shiva and is known as a trishula (Sanskrit for "triple-spear").