naumachy

n. [ L. naumachia, Gr. naymachi`a; nay^s ship + ma`chh fight, battle, ma`chesqai to fight. ] 1. A naval battle; esp., a mock sea fight put on by the ancient Romans. [ 1913 Webster ]

2. (Rom. Antiq.) A show or spectacle representing a sea fight; also, a place for such exhibitions. [ 1913 Webster ]