毫米 háomǐ HSK4 millimeter Definitions Defs Origin Strokes Stroke Words Sentences Sents 毫 háo noun [unit] a unit of measurement meaning one-thousandth of a base unit, such as 毫米 háomǐ or 毫克 háokè; also used to refer to a currency unit of 0.1 yuan米 mǐ nounmeasure word meter meter (unit of length); more formal term is 公尺 gōngchǐ