methadon
  一種鎮痛劑
  meth·a·don /-ˌdɑn/ 名詞
  methadon
       n : synthetic narcotic drug similar to morphine but less
           habit-forming; used in narcotic detoxification and
           maintenance of heroin addiction [syn: methadone, methadone
           hydrochloride, dolophine hydrochloride, fixer, synthetic
           heroin]