The Collaborative International Dictionary of English v.0.48:

Snowberry \Snow"ber`ry\, n. (Bot.)
   A name of several shrubs with white berries; as, the
   Symphoricarpus racemosus of the Northern United States, and
   the Chiococca racemosa of Florida and tropical America.
   [1913 Webster]

   Creeping snowberry. (Bot.) See under Creeping.
      [1913 Webster]

WordNet (r) 3.0 (2006):

snowberry
    n 1: deciduous shrub of western North America having spikes of
         pink flowers followed by round white berries [syn:
         snowberry, common snowberry, waxberry,
         Symphoricarpos alba]