Negative-pressure Definition

noun
Pressure lower than a given reference pressure, generally causing suction rather than exerting an outward pushing force.
American Heritage

Pressure that is less than normal atmospheric pressure.

Wiktionary

The tension in a liquid that is thermodynamically metastable with respect to the vapour phase; especially that in the xylem of vascular plants that allows transpiration to great heights.

Wiktionary

Other Word Forms of Negative-pressure

Noun

Singular:
negative-pressure
Plural:
negative-pressures

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