Definition of Atmospheric
At`mos`pher´ic
a.
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
.
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
.
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
.
- Tomlinson.
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
.
Related Words
air
,
atmosphere
,
atmospherical
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