Hypertext Webster Gateway: "atmospheric"

From Webster's Revised Unabridged Dictionary (1913) (web1913)

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.

2. Existing 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}.

From WordNet (r) 1.7 (wn)

atmospheric
adj : relating to or located in the atmosphere; "atmospheric
tests" [syn: {atmospherical}]


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