[1] : The Collaborative International Dictionary of English v.0.48

vacuum \vac"uum\ va^k"-uu^m, n.; pl. e. vacuums
   va^k"-uu^mz, l. vacua va^k"-u.a. l., fr.
   vacuus empty. see vacuous.
   1. physics a space entirely devoid of matter called also,
      by way of distinction, absolute vacuum; hence, in a more
      general sense, a space, as the interior of a closed
      vessel, which has been exhausted to a high or the highest
      degree by an air pump or other artificial means; as, water
      boils at a reduced temperature in a vacuum.
      1913 webster
      1913 webster

   2. the condition of rarefaction, or reduction of pressure
      below that of the atmosphere, in a vessel, as the
      condenser of a steam engine, which is nearly exhausted of
      air or steam, etc.; as, a vacuum of 26 inches of mercury,
      or 13 pounds per square inch.
      1913 webster

   vacuum brake, a kind of continuous brake operated by
      exhausting the air from some appliance under each car, and
      so causing the pressure of the atmosphere to apply the
      brakes.

   vacuum pan technol., a kind of large closed metallic
      retort used in sugar making for boiling down sirup. it is
      so connected with an exhausting apparatus that a partial
      vacuum is formed within. this allows the evaporation and
      concentration to take place at a lower atmospheric
      pressure and hence also at a lower temperature, which
      largely obviates the danger of burning the sugar, and
      shortens the process.

   vacuum pump. same as pulsometer, 1.

   vacuum tube phys.,
      a a glass tube provided with platinum electrodes and
          exhausted, for the passage of the electrical
          discharge; a geissler tube.
      a any tube used in electronic devices, containing a
          vacuum and used to control the flow of electrons in a
          circuit, as a vacuum diode, triode, tetrode, or
          pentode.

   vacuum valve, a safety valve opening inward to admit air to
      a vessel in which the pressure is less than that of the
      atmosphere, in order to prevent collapse.

   torricellian vacuum. see under torricellian.
      1913 webster
see also:
vacuums vacua vacuous vacuum brake vacuum pan vacuum pump 
pulsometer vacuum tube vacuum valve torricellian vacuum torricellian 

[2] : The Collaborative International Dictionary of English v.0.48

vacuum cleaner \vac"uum clean"er\
   a machine for cleaning carpets, tapestry, upholstered work,
   etc., by suction; -- sometimes called a vacuum.
   webster 1913 suppl.
see also:
vacuum 

[3] : WordNet (r) 2.0

vacuum
     n 1: the absence of matter syn: vacuity
     2: an empty area or space; "the huge desert voids"; "the
        emptiness of outer space"; "without their support he'll be
        ruling in a vacuum" syn: void, vacancy, emptiness
     3: a region empty of matter syn: vacuity
     4: an electrical home appliance that cleans by suction syn: vacuum
        cleaner
     v : clean with a vacuum cleaner; "vacuum the carpets" syn: vacuum-clean,
          hoover
     also: vacua pl
see also:
vacuity void vacancy emptiness vacuum cleaner vacuum-clean 
hoover vacua 

[4] : Moby Thesaurus II by Grady Ward, 1.0

43 moby thesaurus words for "vacuum":
   absence, absence of mind, blank, blankness, broom, brush,
   brush off, clean slate, deprivation, emptiness, empty space,
   empty-headedness, hollowness, inanity, jejunity, mental void,
   negation, negativeness, negativity, nihility, nonbeing, nonentity,
   nonexistence, nonoccurrence, nonreality, nonsubsistence, not-being,
   nothing, nothingness, nullity, sweep, sweep out, sweep up,
   tabula rasa, unactuality, unreality, vacancy, vacuity, vacuousness,
   vacuum-clean, vapidity, void, whisk

Vacuum >> V Words
Vacuum, definition of term: Vacuum
vacuum_pag1.html

Vacuum Cleaner >> V Words
Vacuum Cleaner, definition of term: Vacuum Cleaner
vacuum+cleaner_pag1.html

Vacuum Pump >> V Words
Vacuum Pump, definition of term: Vacuum Pump
vacuum+pump_pag1.html

Vacuum Tube >> V Words
Vacuum Tube, definition of term: Vacuum Tube
vacuum+tube_pag1.html

AVS - The Science and Technology Society

http://www.vacuum.org/, score=100, date indexed=October 5, 2005, 10:13 am

Vacuum Tube Valley
...Copyright © 1995-2005 Vacuum Tube Valley.  All rights reserved.  Vacuum Tube Valley is a.....VACUUM TUBE VALLEY,  P.O. Box 1499,  Lakeport, CA 95453  USA   .. email - email contact..
http://www.vacuumtube.com/, score=99, date indexed=October 5, 2005, 9:18 am

AVS - The Science and Technology Society

http://www.avs.org/, score=96, date indexed=October 5, 2005, 9:40 am

Welcome to the Society of Vacuum Coaters
...Vacuum coating processes use vacuum technology to create a sub-atmospheric pressure environment and an atomic or.....influenced the development of vacuum coating. Education Guides to Vacuum Coating.....Society of Vacuum Coaters (SVC) covers industrial vacuum coating applications using..
http://www.svc.org/, score=96, date indexed=October 5, 2005, 10:18 am

Pfeiffer Vacuum, Inc.
...We are not just selling vacuum hardware, we are providing clever ideas, first class.....vacuum, DryPump, Duo, DuoLine, dust-free, Evacuate, Gas Analysis, Gas Analyzer, Gas.....vacuum, mag-lev, maglev, magnetic, magnetic-Coupling, Mass Analyzer, Mass Spec, Mass..
http://www.pfeiffer-vacuum.com/, score=96, date indexed=October 5, 2005, 10:27 pm

Vacuum Tubes, Inc. Homepage, Electron Tubes
...We'd like to introduce the newest member of the Vacuum Tubes, Inc. family, Christina Cross.....All contents copyright Vacuum Tubes, Inc. 1998-2005.....Vacuum Tubes - Electron Theory and the Diode; Vacuum Tubes - Triodes and Multi-Purpose..
http://www.vacuumtubesinc.com/, score=95, date indexed=October 5, 2005, 7:39 pm

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