The Collaborative International Dictionary of English v.0.48:

'Epergne \['E]`pergne"\, n. [F. ['e]pargne a sparing or saving;
   a treasury. "Our ['e]pergne is a little treasury of
   sweetmeats, fruits, and flowers." --Brewer.]
   A centerpiece for table decoration, usually consisting of
   several dishes or receptacles of different sizes grouped
   together in an ornamental design.
   [1913 Webster]

WordNet (r) 3.0 (2006):

epergne
    n 1: a large table centerpiece with branching holders for fruit
         or sweets or flowers