torr

American

[tawr] / tɔr /

noun

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

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:

torr

What is the volume of the balloon at a height of 20 km, where the temperature is –48 °C and the pressure is 63.1 torr?

From Textbooks ● Feb. 14, 2019

What is the volume of this much methane at 25 °C and 745 torr?

From Textbooks ● Feb. 14, 2019

Hydrogen is removed from the vessel until the partial pressure of nitrogen, at equilibrium, is 250 torr.

From Textbooks ● Feb. 14, 2019

If the change in the pressure of NO2 is 28 torr as a mixture of the four gases reaches equilibrium, how much will the pressure of O2 change?

From Textbooks ● Feb. 14, 2019

Nearly like r in roar; as, ruadh reddish, righ a king, ruith run, torr a heap, ceartas justice.

From Elements of Gaelic Grammar by Alexander Stewart

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023