The Collaborative International Dictionary of English v.0.48:

Cellaret \Cel`lar*et"\, n. [Dim of cellar.]
   A receptacle, as in a dining room, for a few bottles of wine
   or liquor, made in the form of a chest or coffer, or a deep
   drawer in a sideboard, and usually lined with metal.
   [1913 Webster]

WordNet (r) 3.0 (2006):

cellaret
    n 1: sideboard with compartments for holding bottles [syn:
         minibar, cellaret]