Lewis & Short

pentathlos or -us, i, m., = πένταθλος, one who practised the five exercises of pitching the quoit, running, leaping, wrestling, and hurling (post-Aug.), Plin. 34, 8, 19, § 57; so id. 34, 8, 19, §§ 68 and 72.‡ † pentathlum, i, n., = πένταθλον, the contest of the five exercises of pitching the quoit, running, leaping, wrestling, and hurling (post-class.): pentathlum antiqui quinquartium dixerunt. Id autem genus exercitationis ex his quinque artibus constat, jactu disci, cursu, saltu, jaculatione, luctatione, Paul. ex Fest. p. 211 Müll.