Wiktionary
n. atmospheric pressure
WordNet
n. the pressure exerted by the atmosphere [syn: atmospheric pressure]
Usage examples of "air pressure".
On Earth, while total air pressure was one standard atmosphere, oxygen made up only 21 percent of the air and so the partial pressure was 21 percent of one standard atmosphere.
The landscape became more fair and fertile as he proceededhe could see little dusty-looking desert shrubs clawing at the sand with their roots, and once he crossed a small trickle of liquid water that the high air pressure was keeping from boiling away.
But once they had pumped down the pressure in the lock, the inner door had tons of air pressure exerted upon it.
Oxygen poured into the sealed chamber, and the technicians kept it at maximum flow until the air became much denser, several times the air pressure on the other side of the chamber.
Show the local scenery, do a few simple demonstrations of the low air pressure and gravity.
He had driven down to five kilometers above the datum, and the exterior air pressure was 230 millibars.