Definify.com
Webster 1913 Edition
Atmospherical
{
Atˊmos-pher′ic
,Atˊmos-pher′ic-al
, }Adj.
[Cf. F.
atmosphérique
.] 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.
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
.