The Collaborative International Dictionary of English v.0.48:

Epinicion \Ep`i*ni"cion\, n. [NL., fr. Gr. ?, fr. ? belonging to
   victory; 'epi` upon, to + ? victory: cf. L. epinicium.]
   A song of triumph. [Obs.] --T. Warton.
   [1913 Webster]