Source : Webster's Revised Unabridged Dictionary (1913)

Silverberry \Sil"ver*ber`ry\, n. (Bot.)
   A tree or shrub ({El[ae]agnus argentea}) with silvery foliage
   and fruit. --Gray.

Source : WordNet®

silverberry
     n : deciduous unarmed North American shrub with silvery leaves
         and fruits [syn: {silver berry}, {silverbush}, {silver-bush},
          {Elaeagnus commutata}]