air pump

an apparatus for drawing in, compressing, or exhausting air.

(initial capital letters) Astronomy. the constellation Antlia.

Origin of air pump

First recorded in 1650–60

An air-pump and condenser, H, is seen under the steam-cylinder.

A History of the Growth of the Steam-Engine |Robert H. Thurston
When the pan, after continued boiling, requires to be refitted, the pipes (l and w) are connected to an air-pump.

Cooley's Practical Receipts, Volume II |Arnold Cooley
The air-pump is again brought into play, and at last our funnel can really be said to smoke!

The Voyage of the Deutschland |Paul Knig
The vacuum may either be made through the agency of steam, as there pointed out, or by means of an air-pump.

A Dictionary of Arts, Manufactures and Mines |Andrew Ure

A drop of gum water in the exhausted receiver of the air-pump was not sensibly affected in its form when electrified.

Experimental Researches in Electricity, Volume 1 |Michael Faraday

air pump

a device for pumping air in or out of something