atmospheric pressure

Pressure caused by the weight of the atmosphere. It has a mean value of one atmosphere at sea level but reduces with increasing altitude. Also called barometric pressure.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

atmospheric pressure

(General Physics) the pressure exerted by the atmosphere at the earth's surface. It has an average value of 1 atmosphere

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

at′mospher′ic pres′sure

1. the pressure exerted by the earth's atmosphere at any given point.

2. a value of standard or normal atmospheric pressure, equivalent to the pressure exerted by a column of mercury 29.92 in. (760 mm) high, or 1013 millibars (101.3 kilopascals). Also called barometric pressure.

[1655–65]

at·mos·pher·ic pressure

(ăt′mə-sfîr′ĭk)

Pressure caused by the weight of the air. At sea level it has an average value of one atmosphere and gradually decreases as the altitude increases.

Did You Know? The atmosphere that blankets the Earth gently presses down on us, and the subtle variations in this atmospheric pressure greatly affect the weather. For example, forecasters often talk of low pressure bringing rain. In areas of low air pressure, the air is less dense and relatively warm, which causes it to rise. The expanding and rising air naturally cools and the water vapor in the air condenses, forming clouds and the drops that fall as rain. In high pressure regions, on the other hand, the air is dense and relatively cool, which causes it to sink. The water vapor in the sinking air does not condense, leaving the skies sunny and clear. So if you're trying to hit a home run, would you prefer a beautiful, sunny day or one in which it looks like rain? On the overcast day, the ball has less air to push aside on its way out of the ballpark, making it easier to hit a homer.

The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

ThesaurusAntonymsRelated WordsSynonymsLegend:

Noun

atmospheric pressure - the pressure exerted by the atmosphere

air pressure, pressure

gas pressure - the pressure exerted by a gas

barometric pressure - atmospheric pressure as indicated by a barometer

compartment pressure - the air pressure maintained in an air-tight compartment (as in an aircraft)

overpressure - a transient air pressure greater than the surrounding atmospheric pressure; "the overpressure of the blast kills by lethal concussion"

sea-level pressure - the atmospheric pressure reduced by a formula to the pressure at sea level

Translations

Luftdruck

presión atmosférica

pressione atmosferica

atmospheric pressure

n → Luftdruck m

Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007

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The company's SCS is designed to be a transformative device which prevents obstruction in the cerebrospinal fluid, or CSF, catheters implanted in the ventricle of the brain of patients who suffer from hydrocephalus or Normal Pressure Hydrocephalus, or NPH.

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Patients undergo CSF diversion procedures like VP shunting to lower the increased intracranial pressure and protect vision.16,17 The most common presenting complaints in our patients having normal pressure hydrocephalus were gait ataxia and sphincter disturbance.

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Keywords: Normal pressure hydrocephalus, glymphatic system, MRI, pathophysiology

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