WordWeb Online

1. Very thin especially from disease, hunger or cold
   - cadaverous, gaunt, haggard, pinched, skeletal, wasted

1. Cause to grow thin or weak
   "The treatment emaciated him";
   - waste, macerate
    
2. Grow weak and thin or waste away physically
   "She emaciated during the chemotherapy"

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

Type of: change state, debilitate, drain, enfeeble, turn

Encyclopedia: Emaciated