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phosphoroscope

[fos-fawr-uh-skohp, -for-] /fɒsˈfɔr əˌskoʊp, -ˈfɒr-/
noun
1.
an instrument for measuring the duration of evanescent phosphorescence in different substances.
Origin
1855-1860
1855-60; phosphoro- + -scope
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for phosphoroscope

phosphoroscope

/fɒsˈfɒrəˌskəʊp/
noun
1.
an instrument for measuring the duration of phosphorescence after the source of radiation causing it has been removed
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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