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rth; -- applied also to the gaseous envelope of any celestial orb, or other body; as, the atmosphere of Mars.

Of or pertaining to the air, or atmosphere; inhabiting or frequenting the air; produced by or found in the air; performed in the air; as, aërial regions or currents. "Aërial spirits." Milton. "Aërial voyages." Darwin.

A description of the air or atmosphere; aërology.

That department of physics which treats of the atmosphere.

The observation of the state and variations of the atmosphere.

The atmosphere. [R.]

The fluid which we breathe, and which surrounds the earth; the atmosphere. It is invisible, inodorous, insipid, transparent, compressible, elastic, and ponderable.

Aneroid barometer, a barometer the action of which depends on the varying pressure of the atmosphere upon the elastic top of a metallic box (shaped like a watch) from which the air has been exhausted. An index shows the variation of pressure.

A movement of the atmosphere opposite in character, as regards direction of the wind and distribution of barometric pressure, to that of a cyclone. -- An`ti*cy*clon"ic, a. -- An`ti*cy*clon"ic*al*ly, adv.

The upper, contrary-moving current of the atmosphere over a monsoon.

A substance regarded as an element, contained in the atmosphere and remarkable for its chemical inertness. Rayleigh and Ramsay.

ristics of the stars and other heavenly bodies, their chemical constitution, light, heat, atmospheres, etc.

Of or pertaining to the atmosphere; of the nature of, or resembling, the atmosphere; as, atmospheric air; the atmospheric envelope of the earth.

In relation to the atmosphere.

The science or a treatise on the atmosphere.

manating from an electrified body, and forming a mass surrounding it, called the electric atmosphere. See Atmosphere, 2.

ight material, and filled with hydrogen gas or heated air, so as to rise and float in the atmosphere; especially, one with a car attached for aërial navigation.

adition, treating their subjects faithfully and with poetic feeling for color, light, and atmosphere. It is exemplified, esp. in landscapes, by Corot, Rousseau, Daubigny, Jules Dupré, and Diaz. Associated with them are certain painters of animals, as Troyon and Jaque, and of peasant life, as Millet and Jules Breton.…

Of or pertaining to weight, esp. to the weight or pressure of the atmosphere as measured by the barometer.

An instrument for determining the weight or pressure of the atmosphere, and hence for judging of the probable changes of weather, or for ascertaining the height of any ascent.