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inch of mercury

noun

  1. 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. : in. Hg


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Word History and Origins

Origin of inch of mercury1

First recorded in 1825–35

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axolotl

[ak-suh-lot-l ]

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inchoativeInchon