难经 Traditional form: 難經 Pinyin (reading): Nànjīng Definitions: Classic on Medical Problems, c. 1st century AD abbr. for 黃帝八十一難經/黄帝八十一难经 ( Huángdì Bāshíyī Nànjīng) Characters: 难 - hard, difficult, arduous; unable 经 - the classics; to experience, to undergo Traditional characters: 難 - hard, difficult, arduous; unable 經 - the classics; to experience, to undergo