vacuum

  1. the absence of matter
  2. a region empty of matter
  3. an electrical home appliance that cleans by suction

Vacuum

Vacuum is space that is devoid of matter. The word stems from the Latin adjective vacuus for `vacant` or `void`. An approximation to such vacuum is a region with a gaseous pressure much less than atmospheric pressure. Physicists often discuss ideal test results that would occur in a perfect vacuum, which they sometimes simply call `vacuum` o...
Found on http://en.wikipedia.org/wiki/Vacuum

vacuum

(from the article `vacuum technology`) all processes and physical measurements carried out under conditions of below-normal atmospheric pressure. A process or physical measurement is ... ...ever attempted in the history of science—the attempt to explain the creation of truly everything from literally nothing. In other words, is th...
Found on http://www.britannica.com/eb/a-z/v/1

vacuum

(vakĀ“ūm) a space devoid of air or other gas.
Found on http://www.encyclo.co.uk/local/21001

vacuum

[n] - the absence of matter 2. [n] - a region empty of matter 3. [n] - an electrical home appliance that cleans by suction 4. [v] - clean with a vacuum cleaner
Found on http://www.webdictionary.co.uk/definition.php?query=vacuum

Vacuum

• (n.) 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. • (n.) A space entirely devoid of matter (called also, by way of distinction, abso...
Found on http://thinkexist.com/dictionary/meaning/vacuum/

vacuum

vacuum cleaner noun an electrical home appliance that cleans by suction
Found on http://wordnetweb.princeton.edu/perl/webwn?s=vacuum

Vacuum

A given space filled with gas at pressures below atmospheric pressure. Various approximate ranges are: low vacuum, 101325 to 3000 Pamedium vacuum, 3000 to 0. 133 Pahigh vacuum, 0.133 to 1.333x10-4 Pavery high vacuum, 1.333x10-4 to 1.333224x10-7 Paultrahigh vacuum, 1.333224x10-7 Pa and belowHeat TransferIn...
Found on http://www.diracdelta.co.uk/science/source/v/a/vacuum/source.html

Vacuum

A space entirely devoid of matter (called also, by way of distinction, absolute vacuum). 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.
Found on http://www2.slac.stanford.edu/vvc/glossary.html

Vacuum

A theoretical state in which space contains no matter
Found on http://jot101.com/2015/05/a-z-of-science-fiction-words/

Vacuum

A vacuum is a space from which the gas has been removed. In fact it is impossible to obtain a perfect vacuum as any material surrounding a vacuum will have a vapour pressure and will thus release particles into the vacuum. In general use the term refers to gases at very low pressures such as exist at the limit of the earth' s atmosphere. The neares...
Found on http://www.probertencyclopaedia.com/browse/GV.HTM

Vacuum

A volume which contains no matter.
Found on http://www.superglossary.com/Glossary/Science/Chemistry/

vacuum

absolute vaccuum. Compare with partial vaccuum. A volume which contains no matter.
Found on http://antoine.frostburg.edu/chem/senese/101/glossary/v.shtml

Vacuum

Any pressure less than atmospheric. Can present a problem for the elastomer in many seal applications.
Found on http://www.mcnallyinstitute.com/Charts/Glossary-html/Glossary_V.html

Vacuum

Can be used to remove water during a water change (syphon), and can clean the gravel and remove wastes.
Found on http://www.tropicalfishcentre.co.uk/Glossary.htm

Vacuum

Dictionary: Empty space, devoid of matter.
Found on http://www.amgas.com/gloss.htm

Vacuum

Hoover (again the word vacuum is also used)
Found on http://www.encyclo.co.uk/local/21432

vacuum

In general, a region completely empty of matter; in physics, any enclosure in which the gas pressure is considerably less than atmospheric pressure (101,325 pascals)
Found on http://www.talktalk.co.uk/reference/encyclopaedia/hutchinson/m0016224.html

vacuum

In the simplest sense, empty space. However, since a vacuum, either natural or artificial, is never completely empty, the term needs a modifier. Thus scientists speak of a hard vacuum, quantum vacuum, and so forth. See also Casimir effect, vacuum energy drive, and zero point energy.
Found on http://www.daviddarling.info/encyclopedia/V/vacuum.html

vacuum

Origin: 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...
Found on http://www.encyclo.co.uk/local/20973

vacuum

pressure that is less than atmospheric pressure.
Found on http://www.horizonsunlimited.com/gear-up/motorcycle-terms-and-glossary

Vacuum

Pressures below 1 atmosphere. Units are; inches of mercury ('Hg), millimeters (mm Hg), microns (mHg), and generally 10-N (millimeters of mercury). see Insulating Vacuum
Found on http://www-bdnew.fnal.gov/operations/accgloss/gloss.html

Vacuum

refers to a volume of space that has little or no pressure due to the absence of air or any other gasses; there are differing degrees of vacuum, which is why Empire Magnetics offers three different grades of vacuum rated motors and related products.
Found on http://www.empiremagnetics.com/glossary/glossary.htm#A

vacuum

The state of negative pressure. A hydraulic pump works by creating a vacuum in the closed hydraulic system.
Found on http://www.toolingu.com/definition-570340-32792-flow-rate.html

vacuum

Type: Term Pronunciation: vak′yūm Definitions: 1. An empty space, one practically exhausted of air or gas.
Found on http://www.medilexicon.com/medicaldictionary.php?t=96480
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