air chamber

noun

Definition of air chamber 

: a cavity filled with air: such as

a : a cavity containing air to act by its elasticity as a spring for equalizing the flow of a liquid in a pump or other hydraulic machine

b : one of the chambers in the nautilus or other chambered cephalopods

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First Known Use of air chamber

1664, in the meaning defined above

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The first known use of air chamber was in 1664

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