WordWeb Online

1. Lean and wrinkled by shrinkage as from age or illness
   "a shrunken old man";
   - shriveled [US], shrivelled [Brit, Cdn], withered, wizen, wizened
    
2. Reduced in efficacy, vitality or intensity
   "the dollar's shrunken buying power";
   - shriveled [US], shrivelled [Brit, Cdn]

See also: decreased, lean, meager [N. Amer], meagre [Brit, Cdn], reduced, thin

Encyclopedia: Shrunken