like a club, thicker towards the end, versus rhopalicus, in which each word is one syllable longer than that before
like a club, i.e. thicker towards the end: hence, versus rhopalicus, a verse in which each word is one syllable longer than that before (such as Il. 3.182), Serv. in Gramm.Lat. 4.467K. (rhopalius Sacerd. ib. 6.505 K.).