torr


Also found in: Dictionary, Thesaurus, Acronyms, Encyclopedia, Wikipedia.
Related to torr: torrid

torr

 [tor]
a unit of pressure equal to one millimeter of mercury (mm Hg), or 133.3 pascals.

torr

(tōr),
A unit of pressure sufficient to support a 1-mm column of mercury at 0°C against the standard acceleration of gravity at 45° north latitude (980.621 cm/s2); equivalent to 1333.224 dynes/cm2, 1.333224 millibars, 1.35951 cm of H2O, 133.3224 newtons/m2 (or Pa); 1 atmosphere (atm) equals 760 Torr.
[Evangelista Torricelli]

torr

[tôr]
Etymology: Evangelista Torricelli, Italian physicist, 1608-1647
a unit of pressure equal to 1333.22 dynes/cm2, or 1.33322 millibars. One torr is the pressure required to support a column of mercury 1 mm high when the mercury is of standard density and subjected to standard acceleration. These standard conditions are 0° C and 45° latitude, where the acceleration of gravity is 980.6 cm/sec2. In reading a mercury barometer at other temperatures and latitudes, corrections commonly exceeding 2 torr may be required to compensate for the thermal expansion of the measuring scale used.

Torricelli,

Evangelista, Italian scientist, 1608-1647.
torr - a unit of pressure.
torricellian vacuum - a vacuum above the mercury in a barometer tube.

torr (tōr),

n a unit of pressure equivalent to 0.001316 atmosphere; named after the physicist Torricelli. Also called
mm Hg.
References in periodicals archive ?
LOCKED UP: David Torr and Catherine Martin have both been jailed for stabbing a man in Everton
Apparently Torr was dissatisfied with her booklet, sending a copy to Salme Dutt, Palme Dutt's wife, in which she described it as her 'mangy little Tom Mann' and wrote that 'I blush for it and wish it buried'.
Still, said Torr, the state agency wanted to make sure that it "knew exactly what happened and ensure that it won't happen again.
We considered four different reduced pressures of 760, 400, 250 and 60 Torr.
Torr is considerably older than the other kings depicted in this documentary.
Ffion Torr said: ``We opened the shop at the end of June and we have been quite busy.
The furnace will pump to an ultimate vacuum of 10U Torr with a leak up rate of less than 5x10 Torr per hour.
The instrument, able to provide pressure measurements from 1000 Torr to 2x10 Torr, can be configured to display up to six gauges in a single screen, or any number of gauges can be assigned to various screens for auto scrolling of display.
4] Torr in a clean and out-gassed system within three minutes, and 2 x [10.
ANDREW TORR scored twice and set up another as Ormskirk FC delivered an impressive 4-2 victory over Birkdale United in the under-9s.
Chief Insp Steve Torr said: "An investigation has commenced.