partial vacuum

noun

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

Example Sentences

Electrons travel through the partial vacuum inside the tube, flowing from the filament to the positively charged plate.

From The Daily Beast

This shows that an electrical discharge will pass more readily through a partial vacuum than through air at ordinary pressure.

From Project Gutenberg

This steam nozzle throws out its spray with great force and creates a partial vacuum in the chamber, causing the water to flow in.

From Project Gutenberg

As the arched wing cuts through the air it leaves above it a partial vacuum.

From Project Gutenberg

It must be that our repellers have set up a partial vacuum by repelling even the air!

From Project Gutenberg

The foul air will be forced outside by a powerful pump until a partial vacuum is created.

From Project Gutenberg