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INDICATOR
(noun) a device for showing the operating condition of some system
(noun) a number or ratio (a value on a scale of measurement) derived from a series of observed facts; can reveal relative changes as a function of time
synonyms : index , index number , indicant(noun) a signal for attracting attention
(noun) (chemistry) a substance that changes color to indicate the presence of some ion or substance; can be used to indicate the completion of a chemical reaction or (in medicine) to test for a particular reaction
WordNet® 3.0, © 2006 by Princeton University.
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