Zi Collection, Upper Volume Radical: Stone (shí) Page 417, Entry 05 A name for a stone mill, also called "cì". Also "a name for a stone mill" in the "Guangyun" and "Jiyun" dictionaries, with the pronunciation "zu" (falling tone) from the fanqie "zi yu qie". Also "a name for a stone mill" in the "Jiyun" dictionary, with the pronunciation "ji" (rising tone) from the fanqie "zi xi qie". The meaning is the same.