Back pressure

Back 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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  • Back pressure — Back Back, a. 1. Being at the back or in the rear; distant; remote; as, the back door; back settlements. [1913 Webster] 2. Being in arrear; overdue; as, back rent. [1913 Webster] 3. Moving or operating backward; as, back action. [1913 Webster]… …   The Collaborative International Dictionary of English

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  • back pressure — noun 1. : residual pressure on the exhaust side of a steam engine piston against which the steam on the intake side must work 2. : opposition to flow of a liquid or gas due to friction, inertia, gravity, or other cause * * * back pressure noun… …   Useful english dictionary

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  • back pressure-arm lift method — n artificial respiration in which the operator kneels at the head of the prone victim, compresses the chest manually by pressure on the back, and then pulls up the elbows thereby expanding the lungs called also Holger Nielsen method …   Medical dictionary

  • back pressure — pressure in direct opposition to the normal flow …   English contemporary dictionary

  • back pressure valve — atbulinis vožtuvas statusas T sritis Energetika apibrėžtis Vamzdyno vožtuvas, praleidžiantis skysčio ar dujų srautą vamzdynu ar kanalu tik viena kryptimi. atitikmenys: angl. back pressure valve; back flow valve vok. Rückschlagventil, n rus.… …   Aiškinamasis šiluminės ir branduolinės technikos terminų žodynas

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  • back pressure modulated — See negative back pressure modulated valve …   Dictionary of automotive terms

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