Wiktionary
n. 1 Pressure that is less than normal atmospheric pressure 2 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
Usage examples of "negative pressure".
For if, as already explained, our mind energy begins to funnel inwards instead of expanding outwards, a congestion of energy gradually forms in the body, the major organs are prevented from pulsating, cells and tissues suffer and tremendous negative pressure builds up, affecting in its turn the energy counterpart and aura which, as explained, retracts into the body and becomes invisible.
I knew the negative pressure would contain it, so I called sickbay first.
The implosion was so close that their eardrums popped with negative pressure, and Reblax felt his eyeballs tugged in their sockets.
Then Anna, who understood the physical laws of this world, exerted a negative pressure upon me by some willed absence of impulse and to my amazement I now moved as if propelled sharply from behind along the path to the gate, past flowers that distilled inexpressible colours from the black sky above us, colours whose names only exist in an inverted language you could never understand if I were to speak it.
Barefoot, she labored to open the door to Bio-Safety Level Two against the negative pressure that kept contaminants inside Levels Two, Three, and Four.
Chemical and turbulence force changes inside the nebula, caused by the eruptions of billions of sirillium molecules, caused negative pressure areas that dragged currents in, and the shuttle with them.
During the rushed construction of the vessel, the engine room had been designed to achieve negative pressure.
There isn't enough negative pressure to fill the lungs with air sufficiently if the segment is big enough.