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(design engineering)
A tool having a roller equipped with hollow fins; used to remove cores of soil from turf.
One who aerates.
Equipment used for aeration.
Any device for supplying air or gas under pressure, as for fumigating, welding, or ventilating.
(mechanical engineering)
Equipment used to inject compressed air into sewage in the treatment process.
A device which decreases the density of sand by mixing it with air, thus facilitating the movement of sand particles in packing.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



a blade-type scarifier, a machine for breaking up friable substances; it is used chiefly in foundries to loosen molding sand. The operating member of an aerator is a rotor with replaceable blades (24 to 32 units) encased in a housing that is open at the bottom and contains a chain screen. Mounted on the top of the housing is a loading funnel and a pipe for connection to exhaust ventilation. The aerator rotor, which turns at a rate of 580 to 640 rpm, is continuously supplied with molding sand through the loading funnel. The rotor blades catch the sand and throw it vigorously against the chain screen. Impact with the chain breaks up large lumps in the sand. The dust thus created is sucked up through the pipe by a fan. The output of an aerator is between 40 and 80 cu m/hr.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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I now realize the fountain is working as an aerator, which in turn keeps the pond alive and healthy.
Das further explained how ducks act as natural aerators, "Fish require dissolved oxygen.
The aerator has a patented design that speeds up the breathing process by aerating in the time it takes to pour a glass of wine.
Individuals have been telling us that they are already seeing improvements in their lawn after using the aerator shoes.
In order to inject air into passing water flow over deflector, an aerator with dimensions of 5.5x6cm was installed on model no.1 and an aeraor with dimensions of 4x4cm was installed on model no.2.
Work the aerator across affected patches, creating a series of holes.
If you're installing a pullout faucet, the aerator can be tricky to remove.
An aerator is a good way to repent for all of our composting sins.
Multifamily operators and residents can utilize high-efficiency electric and water devices such as CFLs, smart strips, efficient-flow showerheads and aerators and water tank and pipe insulation to lower consumption and bills.
The solar panel operates the aerator and the more the sun shines, the more air flows into your pond.
"We have taken precautionary steps to alleviate the problem by putting aerator units into the lake to help oxygenate it.