vacuum pump
Definitions
General Science
- noun a pump used to reduce the gas pressure of a container
Construction
- A pump that removes air or steam from a space or system by producing a partial vacuum in the area treated.
Electronics
- A pump, such as a diffusion pump, utilized to create a low, medium, high, very high, ultra-high, or extremely high vacuum in a given enclosure, such as a vacuum tube.
http://www.dictionarycentral.com/definition/vacuum-pump.html