Lewis Short
(adjective) : naumăchĭārĭus, a, um, naumachia
* Of or for a mock sea-fight: pons,Plin. 16, 39, 74, § 190.—Hence
* Subst.: nau-măchĭārĭus, ii, m., a combatant in a mock sea-fight, Suet. Claud. 21.
Charlton T. Lewis, Charles Short, A Latin Dictionary