
• A cavity containing air to act as a spring for equalizing the flow of a liquid in a pump or other hydraulic machine. • A chamber or cavity filled with air, in an animal or plant.
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http://thinkexist.com/dictionary/meaning/air_chamber/

A vertical, air-filled pipe that prevents water hammer by absorbing pressure when water is shut off at a faucet or valve.
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http://www.encyclo.co.uk/local/20933
Air' cham`ber 1. A chamber or cavity filled with air, in an animal or plant.
2. A cavity containing air to act as a spring for equalizing the flow of a liquid in a pump or other hydraulic machine.
Found on
http://www.encyclo.co.uk/webster/A/47

Designation (also called chamber) for the free space with a volume of about 15 cubic centimetres in the bottle neck between the surface of the liquid and the closure. Depending on the type of bottle filling, this can actually contain air, but is often filled with inert gas or a vacuum. In the case of sparkling wine bottles, the carbon dioxide ...
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https://glossary.wein.plus/air-chamber

a chamber containing air, as in a pump, lifeboat, or organic body. · Also calleda compartment of a hydraulic system containing air that by its elasticity equalizes the pressure and flow of liquid within the system.
Found on
https://www.infoplease.com/dictionary/air-chamber
No exact match found.