The Collaborative International Dictionary of English v.0.48:
Silverberry \Sil"ver*ber`ry\, n. (Bot.) A tree or shrub (Elaeagnus argentea) with silvery foliage and fruit. --Gray. [1913 Webster]WordNet (r) 3.0 (2006):
silverberry n 1: deciduous unarmed North American shrub with silvery leaves and fruits [syn: silverberry, silver berry, silverbush, silver-bush, Elaeagnus commutata]