Absolute Pressure

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Absolute Pressure

In engineering literature, a term used to indicate pressure above the absolute zero value of pressure that theoretically obtains in empty space or at the absolute zero of temperature as distinguished from gage pressure.
In high-vacuum technology, pressure is understood to correspond to absolute pressure, not gage pressure, and therefore the term absolute pressure is rarely used.

References

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