Atmospheric pressure

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 Webster]

2. Existing or occurring in the atmosphere. [1913 Webster]

The lower atmospheric current. --Darwin. [1913 Webster]

3. Caused, or operated on, by the atmosphere; as, an atmospheric effect; an atmospheric engine. [1913 Webster]

4. Dependent on the atmosphere. [R.] [1913 Webster]

In am so atmospherical a creature. --Pope. [1913 Webster]

{Atmospheric engine}, a steam engine whose piston descends by the pressure of the atmosphere, when the steam which raised it is condensed within the cylinder. --Tomlinson.

{Atmospheric line} (Steam Engin.), the equilibrium line of an indicator card. Steam is expanded ``down to the atmosphere'' when its pressure is equal to that of the atmosphere. (See {Indicator card}.)

{Atmospheric pressure}, the pressure exerted by the atmosphere, not merely downwards, but in every direction. In amounts to about 14.7 Ibs. on each square inch.

{Atmospheric railway}, one in which pneumatic power, obtained from compressed air or the creation of a vacuum, is the propelling force.

{Atmospheric tides}. See under {Tide}. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

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Look at other dictionaries:

  • 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… …   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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