一切經音義 25.267

25.267

毫𭕲（上戶刀反下力私反按孫子筭經十忽為一絲十絲為一毫十毫為一𣯛十氂為一分十分為一寸十寸為一尺十尺為一丈十丈為一引是）。

A hair's breadth (毫: the first character is hu + dao fan; the second is li + si fan; according to Sunzi's Computational Canon: ten hu make one si; ten si make one hao; ten hao make one li; ten li make one fen; ten fen make one cun; ten cun make one chi; ten chi make one zhang; ten zhang make one yin).