- 毫米波 háomǐbō millimeter waveElectromagnetic waves with a wavelength between one and ten millimeters, typically used in radar and wireless communication technology.
- 毫米汞柱 háomǐgǒngzhù millimeter of mercurymillimeter of mercury (mmHg); a unit of pressure
- 毫米水银柱 háomǐshuǐyínzhù millimeter of mercurymillimeter of mercury (mmHg); unit of pressure equivalent to approximately 133.32 pascals or one torr
