noun
also gal·li·ass ˈgalēəs, -ēˌas
( -es )
Etymology: Middle French galeasse, galiace, from Old Italian galeazza, literally, large galley, aug. of galea galley, from Medieval Latin, from Middle Greek — more at galley
: a large fast galley propelled by both sails and oars and mounting guns ; especially : such a ship used by nations of southern Europe in the 16th and 17th centuries