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.

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

What is the molar mass of a gas if 0.0494 g of the gas occupies a volume of 0.100 L at a temperature 26 °C and a pressure of 307 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

The osmotic pressure of a solution containing 7.0 g of insulin per liter is 23 torr at 25 °C. Assuming ideal solution behavior, what is the molar mass of insulin?

From Textbooks • Feb. 14, 2019

För för ymnig rening eller flytning rekommendera vi alltid Lydia E. Pinkhams Vegetable Compound i torr form, antingen som piller eller kakor.

From Treatise on the Diseases of Women by Pinkham, Lydia Estes

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