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Ethereal :: Ethereal (a.) Pertaining to the hypothetical upper, purer air, or to the higher regions beyond the earth or beyond the atmosphere; celestial; as, ethereal space; ethereal regions..

Physiography :: Physiography (n.) The science which treats of the earth's exterior physical features, climate, life, etc., and of the physical movements or changes on the earth's surface, as the currents of the atmosphere and ocean, the secular variations in heat, moisture, magnetism, etc.; physical geography..

Atmosphere :: Atmosphere (n.) The pressure or weight of the air at the sea level, on a unit of surface, or about 14.7 Ibs. to the sq. inch..

Atmosphere :: Atmosphere (n.) Any gaseous envelope or medium.

Hydrometeor :: Hydrometeor (n.) A meteor or atmospheric phenomenon dependent upon the vapor of water; -- in the pl., a general term for the whole aqueous phenomena of the atmosphere, as rain, snow, hail, etc..

Effloresce :: Effloresce (v. i.) To become covered with a whitish crust or light crystallization, from a slow chemical change between some of the ingredients of the matter covered and an acid proceeding commonly from an external source; as, the walls of limestone caverns sometimes effloresce with nitrate of calcium in consequence of the action in consequence of nitric acid formed in the atmosphere..

Weather :: Weather (v. i.) To undergo or endure the action of the atmosphere; to suffer meteorological influences; sometimes, to wear away, or alter, under atmospheric influences; to suffer waste by weather..

Dew-point :: Dew-point (n.) The temperature at which dew begins to form. It varies with the humidity and temperature of the atmosphere.

Storm :: Storm (n.) A violent disturbance of the atmosphere, attended by wind, rain, snow, hail, or thunder and lightning; hence, often, a heavy fall of rain, snow, or hail, whether accompanied with wind or not..

Aerology :: Aerology (n.) That department of physics which treats of the atmosphere.

Humid :: Humid (a.) Containing sensible moisture; damp; moist; as, a humidair or atmosphere; somewhat wet or watery; as, humid earth; consisting of water or vapor..

Atmosphere :: Atmosphere (n.) The portion of air in any locality, or affected by a special physical or sanitary condition; as, the atmosphere of the room; a moist or noxious atmosphere..

Vacuum :: Vacuum (n.) The condition of rarefaction, or reduction of pressure below that of the atmosphere, in a vessel, as the condenser of a steam engine, which is nearly exhausted of air or steam, etc.; as, a vacuum of 26 inches of mercury, or 13 pounds per square inch..

Atmosphere :: Atmosphere (n.) The whole mass of aeriform fluid surrounding the earth; -- applied also to the gaseous envelope of any celestial orb, or other body; as, the atmosphere of Mars..

Westness :: Westness (n.) A watery or moist state of the atmosphere; a state of being rainy, foggy, or misty; as, the wetness of weather or the season..

Misty :: Misty (superl.) Accompained with mist; characterized by the presence of mist; obscured by, or overspread with, mist; as, misty weather; misty mountains; a misty atmosphere..

Volatile :: Volatile (a.) Passing through the air on wings, or by the buoyant force of the atmosphere; flying; having the power to fly..

Twilight :: Twilight (n.) The light perceived before the rising, and after the setting, of the sun, or when the sun is less than 18? below the horizon, occasioned by the illumination of the earth's atmosphere by the direct rays of the sun and their reflection on the earth..

Helium :: Helium (n.) A gaseous element found in the atmospheres of the sun and earth and in some rare minerals.

Buoyancy :: Buoyancy (n.) The property of floating on the surface of a liquid, or in a fluid, as in the atmosphere; specific lightness, which is inversely as the weight compared with that of an equal volume of water..

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