Lewis & Short

mŏnŏbŏlon, i, n., = μόνοσ-βόλος, a single throw, i. e. leaping alone, a game in which various feats of bodily agility are performed without the aid of a leapingpole; diff. from the contomonobolon, where the performer is furnished with such a pole (post-class.), Cod. Just. 3, 43, 3.