Atmosphere

atmosphere /at·mos·phere/ (at´mos-fer)

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.

3. a unit of pressure, being that exerted by the earth's atmosphere at sea level; equal to 1.01325 × 105pascals (approximately 760 mm Hg). Abbreviated atm.

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at·mos·phere (tm-sfîr)

n.

1. A gas surrounding a given body; a gaseous medium.

2. Abbr. atm, atm. A unit of pressure equal to the air pressure at sea level, approximately equal to 1.01325 × 10⁵ newtons per square meter.

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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

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atmosphere (atm),

n the natural body of air, composed of approximately 20% oxygen, 78% nitrogen, and 2% carbon dioxide and other gases.