atmosphere
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atmosphere
[at´mos-fēr]1. the entire gaseous envelope surrounding the earth and subject to the earth's gravitational field.
2. the air or climate in a particular place. adj., atmospher´ic.
at·mos·phere
(at'mŏs-fēr), [atmo- + G. sphaira, sphere]
atmosphere
/at·mos·phere/ (at´mos-fēr)1. the entire gaseous envelope surrounding the earth and subject to the earth's gravitational field.
2. the air or climate in a particular place.
atmosphere (atm)
[at′məsfir]
Etymology: Gk. atmos, vapor, sphaira, sphere
1 the natural body of air covers the surface of the earth. It is composed of approximately 20% oxygen, 78% nitrogen, and 1% argon and other gases, including small amounts of carbon dioxide hydrogen, and ozone as well as traces of helium, krypton, neon, and xenon and varying amounts of water vapor.
2 an envelope of gas, which may or may not duplicate the natural atmosphere in chemical components.
3 a unit of gas pressure that is usually defined as being equivalent to the average pressure of the earth's atmosphere at sea level, or about 14.7 pounds per square inch or 760 mm Hg. atmospheric, adj.
at·mos·phere
(at'mŏs-fēr)1. Any gas surrounding a given body; a gaseous medium.
2. A unit of air pressure equal to 101.325 kPa.
See also: standard atmosphere
See also: standard atmosphere
[atmo- + G. sphaira, sphere]
atmosphere
the gaseous envelope surrounding a particular body such as the earth, or the gaseous content of a given structure or container.Atmosphere
A measurement of pressure. One atmosphere equals the pressure of air at sea level (14.7 pounds per square inch [psi]).
Mentioned in: Recompression Treatment
atmosphere (atm),
n the natural body of air, composed of approximately 20% oxygen, 78% nitrogen, and 2% carbon dioxide and other gases.