Atmospheric pressure

Atmospheric pressure
Pressure Pres"sure (?; 138), n. [OF., fr. L. pressura, fr. premere. See 4th {Press}.] 1. The act of pressing, or the condition of being pressed; compression; a squeezing; a crushing; as, a pressure of the hand. [1913 Webster]

2. A contrasting force or impulse of any kind; as, the pressure of poverty; the pressure of taxes; the pressure of motives on the mind; the pressure of civilization. [1913 Webster]

Where the pressure of danger was not felt. --Macaulay. [1913 Webster]

3. Affliction; distress; grievance. [1913 Webster]

My people's pressures are grievous. --Eikon Basilike. [1913 Webster]

In the midst of his great troubles and pressures. --Atterbury. [1913 Webster]

4. Urgency; as, the pressure of business. [1913 Webster]

5. Impression; stamp; character impressed. [1913 Webster]

All saws of books, all forms, all pressures past. --Shak. [1913 Webster]

6. (Mech.) The action of a force against some obstacle or opposing force; a force in the nature of a thrust, distributed over a surface, often estimated with reference to the amount upon a unit's area. [1913 Webster]

7. Electro-motive force. [Webster 1913 Suppl.]

{Atmospheric pressure}, {Center of pressure}, etc. See under {Atmospheric}, {Center}, etc.

{Back pressure} (Steam engine), pressure which resists the motion of the piston, as the pressure of exhaust steam which does not find free outlet.

{Fluid pressure}, pressure like that exerted by a fluid. It is a thrust which is normal and equally intense in all directions around a point. --Rankine.

{Pressure gauge}, a gauge for indicating fluid pressure; a manometer. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

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  • Atmospheric pressure — Atmospheric At mos*pher ic, Atmospherical At mos*pher ic*al, a. [Cf. F. atmosph[ e]rique.] 1. Of or pertaining to the atmosphere; of the nature of, or resembling, the atmosphere; as, atmospheric air; the atmospheric envelope of the earth. [1913… …   The Collaborative International Dictionary of English

  • atmospheric pressure — n the pressure exerted in every direction at any given point by the weight of the atmosphere * * * the pressure exerted by the atmosphere, usually considered as the downward pressure of air onto a unit of area of the earth s surface; the unit of… …   Medical dictionary

  • atmospheric pressure — n. the pressure due to the weight of the earth s atmosphere, usually measured by a standard unit: see ATMOSPHERE (sense 7) …   English World dictionary

  • Atmospheric pressure — Air pressure redirects here. For the pressure of air in other systems, see pressure. Atmospheric pressure is the force per unit area exerted against a surface by the weight of air above that surface in the Earth s atmosphere. In most… …   Wikipedia

  • atmospheric pressure — Meteorol. 1. the pressure exerted by the earth s atmosphere at any given point, being the product of the mass of the atmospheric column of the unit area above the given point and of the gravitational acceleration at the given point. 2. a value of …   Universalium

  • atmospheric pressure — at′mospher′ic pres′sure n. 1) mer the pressure exerted by the earth s atmosphere at any given point 2) mer 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… …   From formal English to slang

  • atmospheric pressure — N UNCOUNT Atmospheric pressure is the pressure of the atmosphere on the Earth s surface …   English dictionary

  • atmospheric pressure — atmosferos slėgis statusas T sritis ekologija ir aplinkotyra apibrėžtis Hidrostatinis slėgis, kuriuo atmosfera slegia joje esančius daiktus ir Žemės paviršių. Atmosferos slėgio vienetas yra paskalis (Pa): 101325 Pa = 1 atm = 760 mm aukščio… …   Ekologijos terminų aiškinamasis žodynas

  • atmospheric pressure — atmosferos slėgis statusas T sritis automatika atitikmenys: angl. atmospheric pressure vok. atmosphärischer Druck, m; Atmospärendruck, m; Luftdruck, m rus. атмосферное давление, n pranc. pression atmosphérique, f …   Automatikos terminų žodynas

  • atmospheric pressure — atmosferos slėgis statusas T sritis Standartizacija ir metrologija apibrėžtis Hidrostatinis slėgis, kuriuo kiekviename atmosferos taške oras, suspaustas aukščiau esančių atmosferos sluoksnių, ir pats slegia aplinką. atitikmenys: angl. atmospheric …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

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