(definition) by Webster 1913 Tue Dec 21 1999 at 21:42:09

Air" pump` (#).

1. Physics

A kind of pump for exhausting air from a vessel or closed space; also, a pump to condense air of force in into a closed space.

2. Steam Engines

A pump used to exhaust from a condenser the condensed steam, the water used for condensing, and any commingled air.

 

© Webster 1913.

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