from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A unit of pressure that is equal to approximately 1.316 × 10−3 atmosphere or 133.3 pascals.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A unit of pressure that is equal to approximately 1.316·10-3 atmosphere or 133.3 pascals.


from The American Heritage® Dictionary of the English Language, 4th Edition

[After Evangelista Torricelli.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

Named for Evangelista Torricelli, an Italian physicist


Help support Wordnik (and make this page ad-free) by adopting the word torr.


  • The residual gas pressure is the primary indicator of quality, and is most commonly measured in units called torr, even in metric contexts.

    Answerbag: Latest Questions in Question Categories 2009

  • An arterial blood gas determination of 50 percent FiO2 mask was pH 7.35, pCO2 30 torr and pO2 152 torr.

    Colchicine Poisoning 2010

  • The best-known sweet at Christmastime is turr ó n , or torr ó in Catalan — a nougat made from sugar, honey and egg whites.

    Catalonia J. S. Marcus 2010

  • At 10-9 torr, it'll take a thousand seconds, about 17 minutes.

    Rabett Run EliRabett 2009

  • Eli, at a pressure of 10-6 torr, you get a new monolayer in about a second.

    Rabett Run EliRabett 2009

  • Climate scientists require an isotropic emission signature from gas phase CO2 at 255 K and 400 torr to make their models work.

    Unthreaded #20 « Climate Audit 2007

  • I mean, while I was publishing this post you're reading now, the following arrives in my in-box: cannabis camille. chard the itsappian tribesman blimp marksman torr checkup. drawn we cottrell, expurgate we harelip Yexpand crayon?

    Boing Boing: October 17, 2004 - October 23, 2004 Archives 2004

  • There are a very few words - brock, for badger being one, combe, meaning a deep valley, and which appears in some English village names and in contemporary Welsh, another, torr, a mountain peak - which seem to have survived, at least among those who speak preciously or somewhat pedantically today.

    Excerpt: The Meaning of Everything by Simon Winchester 2003

  • The antiprotons could be stored for many hours, circulating inside a tube under exceptionally high vacuum (10-12 torr) to prevent them from being destroyed too quickly in encounters with normal matter, i.e. in this case with residual air molecules.

    Accelerators and Nobel Laureates 2001

  • The opposite side had likewise fields below, with one grey farm house peeping in sight, and red cattle feeding in one, and above the same rocky woodland, meeting the other at the quarry; and then after a little cascade had tumbled down from the steeper ground, giving place to the heathery peaty moor, which ended, more than two miles off in a torr like a small sphinx.

    Modern Broods Charlotte Mary Yonge 1862


Log in or sign up to get involved in the conversation. It's quick and easy.