The Collaborative International Dictionary
Pulsometer \Pul*som"e*ter\, n. [Pulse + -meter.]
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.
A pulsimeter.
Wiktionary
n. A piece of equipment used for extraction of gas or vapour from an enclosed space, leaving the container with a partial vacuum.
WordNet
n. a pump that moves air in or out of something [syn: air pump]
Wikipedia
A vacuum pump is a device that removes gas molecules from a sealed volume in order to leave behind a partial vacuum. The first vacuum pump was invented in 1650 by Otto von Guericke, and was preceded by the suction pump, which dates to antiquity.
Usage examples of "vacuum pump".
It was of course meant to spray water, not suck it up, but a vacuum pump had neatly reversed its function.
The water she used was sucked away by a vacuum pump, for further recycling.
The access doors built into the metal body were almost perfectly suited to Ghosn's purpose, and the ample void space held the vacuum pump, in case that was needed.
Nadia found the Sabatier's problem, and went to work fixing a broken vacuum pump.
Before the last bell had died away, the rhythmic whack-whack-whack of a big vacuum pump could be heard.
As we passed the animal control complex, we could hear the ooka-ooka-ooka of the vacuum pump, working the death box.