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.

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

Determine the partial pressure of cyclobutene and its concentration after 30.0 minutes if an isomerization reaction is carried out at 150 °C with an initial pressure of 55 torr.

From Textbooks • Feb. 14, 2019

What is the pressure of this gas in atmospheres and torr?

From Textbooks • Feb. 14, 2019

Use Henry’s law to determine the solubility of this gaseous solute when its pressure is 760 torr.

From Textbooks • Feb. 14, 2019

Se dr� astah �one torr �tforan eallum �am folce, and astrehtum earmum ongann fleogan on �a lyft.

From The Homilies of the Anglo-Saxon Church Containing the Sermones Catholici, or Homilies of ?lfric, in the Original Anglo-Saxon, with an English Version. Volume I. by Aelfric, Abbot of Eynsham

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