Source : Webster's Revised Unabridged Dictionary (1913)

Dithyrambic \Dith`y*ram"bic\, a. [L. dithyrambicus, Gr. ?: cf.
   F. dithyrambique.]
   Pertaining to, or resembling, a dithyramb; wild and
   boisterous. ``Dithyrambic sallies.'' --Longfellow. -- n. A
   dithyrambic poem; a dithyramb.

Source : WordNet®

dithyrambic
     adj : of or in the manner of a dithyramb