They are a popular sport fish of the billfish category, though elusive. Gladius is generally believed to be a Celtic loan in Latin ( perhaps via an Etruscan intermediary. The word appears in literature as early as the plays of Plautus ( Casina, Rudens).Its ( nominative and vocative) plural is gladiī. Gladius is a Latin masculine second declension noun. In order to navigate out of this carousel please use your heading shortcut key to navigate to the next previous ndor Tool & Knife, Mainz Gladius Sword, 18- 3/ 4in Blade Leather Handle with Sacabbard. About this game: DOOM 3 BFG Edition is the ultimate collection of games that defined the first person shooter including DOOM DOOM 3: Resurrection of Evil, DOOM II, DOOM 3 The Lost EE GOG PC GAMES PRESENTS.