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Atomic Clock

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Atomic Clock - definition(s)

atomic clock - [physics] A clock that keeps time by the radiation frequency associated with a particular atomic reaction. Atomic clocks are used in official timekeeping.

[Category=Geospatial ]

Source: esri, 23 January 2012 08:51:17, http://support.esri.com/en/knowledgebase/GISDictionary/term/abbreviation External 


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