The Collaborative International Dictionary of English v.0.48:

Resplendence \Re*splen"dence\ (r?*spl?n"dens), Resplendency
\Re*splen"den*cy\ (-den*s?), n. [L. resplendentia.]
   The quality or state of being resplendent; brilliant luster;
   vivid brightness; splendor.
   [1913 Webster]

         Son! thou in whom my glory I behold
         In full resplendence, heir of all my might. --Milton.
   [1913 Webster]

         The resplendency of his own almighty goodness. --Dr. J.
                                                  Scott.
   [1913 Webster]

WordNet (r) 3.0 (2006):

resplendency
    n 1: brilliant radiant beauty; "the glory of the sunrise" [syn:
         glory, resplendence, resplendency]