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An instrument for ascertaining the quantity of a fluid evaporated in a given time; an atmometer.

Exhaust pipe (Steam Engine), the pipe that conveys exhaust steam from the cylinder to the atmosphere or to the condenser. Exhaust port (Steam Engine), the opening, in the cylinder or valve, by which the exhaust steam escapes. -- Exhaust purifier (Milling), a machine for sorting grains, or purifying middlings by an exh…

Falling star. (Astron.) See Shooting star. -- Falling stone, a stone falling through the atmosphere; a meteorite; an aërolite. -- Falling tide, the ebb tide. -- Falling weather, a rainy season. [Colloq.] Bartlett.

Watery vapor condensed in the lower part of the atmosphere and disturbing its transparency. It differs from cloud only in being near the ground, and from mist in not approaching so nearly to fine rain. See Cloud.

Filled or abounding with fog, or watery exhalations; misty; as, a foggy atmosphere; a foggy morning. Shak.

g. -- Frost smoke, an appearance resembling smoke, caused by congelation of vapor in the atmosphere in time of severe cold. The brig and the ice round her are covered by a strange black obscurity: it is the frost smoke of arctic winters. Kane. -- Frost valve, a valve to drain the portion of a pipe, hydrant, pump, etc.…

moon, and supposed to be caused by the refraction of light through crystals of ice in the atmosphere. Connected with halos there are often white bands, crosses, or arches, resulting from the same atmospheric conditions.

aries [of Rome] who had been the "massive iron hammers" of the whole earth. J. H. Newman. Atmospheric hammer, a dead-stroke hammer in which the spring is formed by confined air. -- Drop hammer, Face hammer, etc. See under Drop, Face, etc. -- Hammer fish. See Hammerhead. -- Hammer hardening, the process of hardening…

A gaseous element found in the atmospheres of the sun and earth and in some rare minerals.

Having or involving a pressure greatly exceeding that of the atmosphere; -- said of steam, air, water, etc., and of steam, air, or hydraulic engines, water wheels, etc.

ly solid; -- said of a barometer constructed of solid materials to show the variations of atmospheric pressure without the use of liquids, as the aneroid.

dition of the body, due to long confinement in a hospital, or the morbid condition of the atmosphere of a hospital.

Containing sensible moisture; damp; moist; as, a humidair or atmosphere; somewhat wet or watery; as, humid earth; consisting of water or vapor. Evening cloud, or humid bow. Milton.

te degree of wetness, which is perceptible to the eye or touch; -- used especially of the atmosphere, or of anything which has absorbed moisture from the atmosphere, as clothing.

A poetic term for the sea or the atmosphere. "The clear hyaline, the glassy sea." Milton. Our blood runs amazed 'neath the calm hyaline. Mrs. Browning.

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. Nichol.

That branch of meteorology which relates to, or treats of, water in the atmosphere, or its phenomena, as rain, clouds, snow, hail, storms, etc.

The aqueous vapor of the entire atmosphere.

An instrument for recording automatically the variations of the humidity of the atmosphere.

An instrument for measuring the degree of moisture of the atmosphere. Daniell's hygrometer, a form of hygrometer consisting of a bent glass tube terminating in two bulbs, the one covered with muslin, the other of black glass, and containing ether and a thermometer. Ether being poured on the muslin, the black ball, cool…