Atlas powder, a nitroglycerin blasting compound of pasty consistency and great explosive power.
At"las, n. [Ar., smooth.] A rich kind of satin manufactured in India. Brande & C.
At`mi*dom"e*ter (&?;), n. [Gr. &?;, &?;, smoke, vapor + -meter; cf. F. atmidomètre.] An instrument for measuring the evaporation from water, ice, or snow. Brande & C.
At"mo (&?;), 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.
{ At`mo*log"ic (&?;), At`mo*log"ic*al (&?;), } a. Of or pertaining to atmology. "Atmological laws of heat." Whewell.
At*mol"o*gist (&?;), n. One who is versed in atmology.
At*mol"o*gy (&?;), n. [Gr. &?; vapor + - logy.] (Physics) That branch of science which treats of the laws and phenomena of aqueous vapor. Whewell.
At*mol"y*sis (&?;), n. [Gr. &?; vapor + &?; a loosing, &?; to loose.] (Chem.) The act or process of separating mingled gases of unequal diffusibility by transmission through porous substances.
At`mol*y*za"tion, n. (Chem.) Separation by atmolysis.
At"mo*lyze (&?;), v. t. (Chem.) To subject to atmolysis; to separate by atmolysis.
At"mo*ly`zer (&?;), n. (Chem.) An apparatus for effecting atmolysis.
At*mom"e*ter (&?;), n. [Gr. &?; smoke, vapor + -meter: cf. F. atmomètre.] An instrument for measuring the rate of evaporation from a moist surface; an evaporometer. Huxley.
At"mos*phere (&?;), n. [Gr. &?; vapor (akin to Skr. tman breath, soul, G. athem breath) + &?; 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.
An atmosphere of cold oxygen.
Miller.
2. A supposed medium around various bodies; as, electrical atmosphere, a medium formerly supposed to surround electrical bodies. Franklin.
3. 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.
Hydrogen was liquefied under a pressure of 650 atmospheres.
Lubbock.