Atmosphere

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Atmosphere



1. The envelope of air surrounding the earth; also the body of gases surrounding or comprising any planet or other celestial body. Compare biosphere, geosphere, hydrosphere, lithosphere. See atmospheric shell.


2. = standard atmosphere.
3. (abbr atm) A unit of pressure equal to 14.7 pounds per square inch.

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use