Found 2 items, similar to vacuum pump.
English → English (WordNet) Definition: vacuum pump vacuum pump n : a pump that moves air in or out of something [syn: air pump]
English → English (gcide) Definition: vacuum pump Pulsometer \Pul*som"e*ter\, n. [Pulse + -meter.] [1913 Webster] 1. A device, with valves, for raising water by steam, partly by atmospheric pressure, and partly by the direct action of the steam on the water, without the intervention of a piston; -- also called vacuum pump. [1913 Webster] 2. A pulsimeter. [1913 Webster]