epinicion

from The Century Dictionary.

• noun A song of triumph; a poem in celebration of a victory; especially, in ancient Greece, a poem in honor of a victory in an athletic contest, as at the Olympic, Pythian, Nemean, or Isthmian games. The poems of Pindar which have come down to us are almost all epinicia.
• noun In the Gr. Ch., the triumphal hymn; the Sanctus (which see).

from the GNU version of the Collaborative International Dictionary of English.

• noun obsolete A song of triumph.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun in Ancient Greece A song or ode in celebration of triumph or victory