n. [ Contr. fr. atmosphere. ] (Physics) The standard atmospheric pressure used in certain physical measurements calculations; conventionally, that pressure under which the barometer stands at 760 millimeters, at a temperature of 0° Centigrade, at the level of the sea, and in the latitude of Paris. Sir W. Thomson. [ 1913 Webster ]

{ } a. Of or pertaining to atmology. “Atmological laws of heat.” Whewell. [ 1913 Webster ]

n. One who is versed in atmology. [ 1913 Webster ]

n. [ Gr. &unr_; vapor + -logy. ] (Physics) That branch of science which treats of the laws and phenomena of aqueous vapor. Whewell. [ 1913 Webster ]

n. [ Gr. &unr_; vapor + &unr_; a loosing, &unr_; to loose. ] (Chem.) The act or process of separating mingled gases of unequal diffusibility by transmission through porous substances. See also gaseous diffusion. [ 1913 Webster ]

n. (Chem.) Separation by atmolysis. [ 1913 Webster ]

v. t. (Chem.) To subject to atmolysis; to separate by atmolysis. [ 1913 Webster ]

n. (Chem.) An apparatus for effecting atmolysis. [ 1913 Webster ]

n. [ Gr. &unr_; smoke, vapor + -meter: cf. F. atmomètre. ] An instrument for measuring the rate of evaporation from a moist surface; an evaporometer. Huxley. [ 1913 Webster ]

n. [ Gr. &unr_; vapor (akin to Skr. ātman breath, soul, G. athem breath) + &unr_; sphere: cf. F. atmosphère. See Sphere. ] 1. (Physics) (a) The whole mass of aëriform fluid surrounding the earth; -- applied also to the gaseous envelope of any celestial orb, or other body; as, the atmosphere of Mars. (b) Any gaseous envelope or medium. [ 1913 Webster ]

An atmosphere of cold oxygen. Miller. [ 1913 Webster ]

2. A supposed medium around various bodies; as, electrical atmosphere, a medium formerly supposed to surround electrical bodies. Franklin. [ 1913 Webster ]

3. The pressure or weight of the air at the sea level, on a unit of surface, or about 14.7 lbs. to the sq. inch. [ 1913 Webster ]

Hydrogen was liquefied under a pressure of 650 atmospheres. Lubbock. [ 1913 Webster ]

4. Any surrounding or pervading influence or condition. [ 1913 Webster ]

The chillest of social atmospheres. Hawthorne. [ 1913 Webster ]

5. 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. [ 1913 Webster ]