(Chinesephonetics) A systematic six-character description of a syllable's Middle Chinese pronunciation: rhyme group (攝/摄 (shè)), open-mouthed or closed-mouthed (呼 (hū)), division (等 (děng)), tone (聲調/声调 (shēngdiào)), rime (韻母/韵母 (yùnmǔ)), and initial (聲母/声母 (shēngmǔ)).