rhopalic

from The Collaborative International Dictionary of English v.0.48

Rhopalic \Rho*pal"ic\, a. [Gr. ???? club-shaped; fr. ??? a club:
   cf. F. rhopalique.] (Pros.)
   Applied to a line or verse in which each successive word has
   one more syllable than the preceding.
   [1913 Webster]