尺素 chǐsù white silk; letter Origin Definitions Defs Strokes Stroke Words Sentences Sents chǐsù white silk; letter · archives 尺 chǐ noun chi a Chinese unit of length equal to one-third of a meter; a Chinese foot素 sù raw silk (literary) white raw silk; (by extension) books or letters written on silkchǐsù painting 尺 chǐ tiny (literary) very small; tiny; minute素 sù raw silk (literary) white raw silk; (by extension) books or letters written on silk