Found 2 items, similar to Atmospheric pressure.
English → English
Definition: atmospheric pressure
n : the pressure exerted by the atmosphere [syn: air pressure
English → English
Definition: Atmospheric pressure
(?; 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
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.
Where the pressure of danger was not felt.
3. Affliction; distress; grievance.
My people's pressures are grievous. --Eikon
In the midst of his great troubles and pressures.
4. Urgency; as, the pressure of business.
5. Impression; stamp; character impressed.
All saws of books, all forms, all pressures past.
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.
7. Electro-motive force.
[Webster 1913 Suppl.]
, Center of pressure
, etc. See under
(Steam engine), pressure which resists the
motion of the piston, as the pressure of exhaust steam
which does not find free outlet.
, pressure like that exerted by a fluid. It
is a thrust which is normal and equally intense in all
directions around a point. --Rankine.
, a gauge for indicating fluid pressure; a
, 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.
2. Existing or occurring in the atmosphere.
The lower atmospheric current. --Darwin.
3. Caused, or operated on, by the atmosphere; as, an
atmospheric effect; an atmospheric engine.
4. Dependent on the atmosphere. [R.]
In am so atmospherical a creature. --Pope.
, a steam engine whose piston descends by
the pressure of the atmosphere, when the steam which
raised it is condensed within the cylinder. --Tomlinson.
(Steam Engin.), the equilibrium line of an
indicator card. Steam is expanded “down to the
when its pressure is equal to that of the
atmosphere. (See Indicator card
, the pressure exerted by the
atmosphere, not merely downwards, but in every direction.
In amounts to about 14.7 Ibs. on each square inch.
, one in which pneumatic power, obtained
from compressed air or the creation of a vacuum, is the
. See under Tide