内经 Traditional form: 內經 Pinyin (reading): Nèijīng Definitions: abbr. for 黃帝內經/黄帝内经 ( Huángdì Nèijīng), The Yellow Emperor's Internal Canon, medical text c. 300 BC Characters: 内 - inside 经 - the classics; to experience, to undergo Traditional characters: 內 - inside 經 - the classics; to experience, to undergo