丝米 sīmǐ decimillimeter Origin Definitions Defs Strokes Stroke Words Sentences Sents 丝 絲 sī tenth-of-a-milli (bound form) a unit of length equal to one ten-thousandth (1/10,000), specifically a decimillimeter (0.1 mm or 丝米 sīmǐ)米 mǐ nounmeasure word meter meter (unit of length); more formal term is 公尺 gōngchǐ