毫米 háomǐ HSK4 millimeter Origin Definitions Defs Strokes Stroke Words Sentences Sents 毫米波 háomǐbō millimeter wave millimeter wave (radio signal)毫米汞柱 háomǐgǒngzhù mmHg millimeter of mercury, a unit of pressure commonly used in medicine and physics毫米水银柱 háomǐshuǐyínzhù mmHg millimeter of mercury (unit of pressure)