The Collaborative International Dictionary of English v.0.48:

Bearberry \Bear"ber*ry\, n. (Bot.)
   A trailing plant of the heath family (Arctostaphylos
   uva-ursi), having leaves which are tonic and astringent, and
   glossy red berries of which bears are said to be fond.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Arctostaphylos uva-ursi
    n 1: evergreen mat-forming shrub of North America and northern
         Eurasia having small white flowers and red berries; leaves
         turn red in autumn [syn: common bearberry, red
         bearberry, wild cranberry, mealberry, hog cranberry,
         sand berry, sandberry, mountain box, bear's grape,
         creashak, Arctostaphylos uva-ursi]