partial vacuum

American  

noun

1. an enclosed space from which part of the air or another gas has been removed.

---

Example Sentences

The result is a powerful blast followed by a partial vacuum as oxygen is sucked from the air as the fuel burns.

From Seattle Times

“This vacuum would then suck down the parcels until they mostly fill in the vacuum, i.e., until they move tangent to the airfoil again. This is the physical mechanism which forces the parcels to move along the airfoil shape. A slight partial vacuum remains to maintain the parcels in a curved path.”

From Scientific American

Once the high-pressure gas has escaped, a partial vacuum is left behind in the neck of the bottle that sucks air back in.

From The Wall Street Journal

These use air-compressors attached to the ends of tubes to create a partial vacuum that pulls cargo along.

From The Guardian

Invented in 1928, the iron lung saved lives, but it also confined its paralyzed users to mostly horizontal lives in a metal tube, sealed around their extremities, that created and released a partial vacuum inside to force air into and out of their lungs.

From Slate