Neptune. The sea. In Roman mythology the divine monarch of the ocean. The principal exploits and merits ascribed to Neptune are, the assistance to Jupiter against the Titans; the building of the walls and ramparts of Troy; the creation and taming of the horse; the raising of the Island Delos out of the sea; and the destruction of Hippolytus by a monster from the deep. He was feared also as the author of earthquakes and deluges, which he caused or checked at pleasure by his trident.

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