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torr

American  
[tawr] / tɔr /

noun

  1. a unit of pressure, being the pressure necessary to support a column of mercury one millimeter high at 0°C and standard gravity, equal to 1333.2 microbars.


torr British  
/ tɔː /

noun

  1. a unit of pressure equal to one millimetre of mercury (133.322 newtons per square metre)

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of torr

First recorded in 1945–50; named after E. Torricelli

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

At 40 °C, water at low pressure is a vapor; at pressures higher than about 75 torr, it converts into a liquid.

From Textbooks Feb. 14, 2019

A typical barometric pressure in Kansas City is 740 torr.

From Textbooks Feb. 14, 2019

The pressure of a gas may be expressed in the SI unit of pascal or kilopascal, as well as in many other units including torr, atmosphere, and bar.

From Textbooks Feb. 14, 2019

If the vapor pressure of pure water at 25 °C is 23.7 torr, what is the vapor pressure of the solution assuming ideal behavior?

From Textbooks Feb. 14, 2019

A high rock or peak: also a tower, thus retaining the same meaning it had, as torr, with the Anglo-Saxons.

From The Sailor's Word-Book An Alphabetical Digest of Nautical Terms, including Some More Especially Military and Scientific, but Useful to Seamen; as well as Archaisms of Early Voyagers, etc. by Belcher, Edward, Sir

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