inch of mercury
a unit of atmospheric pressure, being the pressure equal to that exerted by a column of mercury one inch high under standard conditions of temperature and gravity: 33.864 millibars. Abbreviation: in. Hg
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- inch along,
- inch by inch,
- inch plant,
Origin of inch of mercury
First recorded in 1825–35
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019