Negative pressure

(physics) A way of expressing vacuum; a pressure less than atmospheric or the standard 760 mmHg (101,325 pascals).

A pressure less than atmospheric.

Pressure that is less than ambient temperature.

Negative pressure may refer to:

• vacuum
• negative gauge pressure, a way of expressing pressure measurements below atmospheric pressure
• suction
• transpirational pull

See also

• pressure
• positive pressure

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