mmH2O
Translingual
Etymology
mm (“millimeter”) + H2O (“water”)
Symbol
mmH2O
- abbreviation of millimeter of water (“a unit of pressure, the pressure exerted by a column of water of 1 mm in height at 4 °C (in standard conditions, the temperature at which water has maximum density, in standard Earth gravity)”)
Synonyms
- mm.g
- mm.w.g.
- mm.wc