inch of mercury

American  

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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Etymology

Origin of inch of mercury

First recorded in 1825–35

Example Sentences

Now it is known that one cubic inch of mercury weighs about half a pound.

From General Science by Clark, Bertha M.

He could reduce the pressure in the large receiver to somewhat less than that corresponding to an inch of mercury, or about a foot of water.

From Heroes of Science: Physicists by Garnett, William

Bartrum it is claimed that readings to .001 of an inch of mercury can be taken without the use of a vernier.

From Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3 "Banks" to "Bassoon" by Various

I looked at the barometer, and reported that there was scarcely three-eighths of an inch of mercury in the tube.

From Pharaoh's Broker Being the Very Remarkable Experiences in Another World of Isidor Werner by Douglass, Ellsworth

A pressure of one inch of mercury is sufficient for any work that I have yet undertaken.

From Scientific American Supplement, No. 365, December 30, 1882 by Various