Source : Webster's Revised Unabridged Dictionary (1913)

Salal-berry \Sal"al-ber`ry\, n. [Probably of American Indian
   origin.] (Bot.)
   The edible fruit of the {Gaultheria Shallon}, an ericaceous
   shrub found from California northwards. The berries are about
   the size of a common grape and of a dark purple color.

Shallon \Shal"lon\, n. (Bot.)
   An evergreen shrub ({Gaultheria Shallon}) of Northwest
   America; also, its fruit. See {Salal-berry}.

Gaultheria \Gaul*the"ri*a\, n. [NL.] (Bot.)
   A genus of ericaceous shrubs with evergreen foliage, and,
   often, edible berries. It includes the American winter-green
   ({Gaultheria procumbens}), and the larger-fruited salal of
   Northwestern America ({Gaultheria Shallon}).

Source : WordNet®

Gaultheria shallon
     n : small evergreen shrub of Pacific coast of North America
         having edible dark purple grape-size berries [syn: {salal},
          {shallon}]