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

A cubic inch of mercury at this temperature has been ascertained to weigh 0·48967 lbs. avoirdupois.

From A Treatise on Meteorological Instruments Explanatory of Their Scientific Principles, Method of Construction, and Practical Utility by Negretti, Henry

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

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

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

From General Science by Clark, Bertha M.

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