atmosphere

(at′mŏs-fēr″ )

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[Gr. atmos, vapor + sphere ]

1. The gases surrounding the earth.
2. Climatic condition of a locality.
3. In physics, the pressure of the air on the earth at mean sea level, approx. 14.7 lb/sq in (101,325 pascals or 760 torr).
4. In chemistry, any gaseous medium around a body.
atmospheric (at″mŏs-fēr′ik )

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, adj.

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