air pump

an apparatus for drawing in, compressing, or exhausting air.
(initial capital letters) Astronomy. the constellation Antlia.

1650–60 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To air pump
Example sentences
The machine at the top is the air pump for aeration.
All you need is a powerful air pump and a large pressure tank.
Don't rely on the tire gauge at a gas station air pump.
On the left is a battery pack to power the air pump on the right.
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