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phosphoroscope

[fos-fawr-uh-skohp, -for-]
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noun
  1. an instrument for measuring the duration of evanescent phosphorescence in different substances.
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Origin of phosphoroscope

First recorded in 1855–60; phosphoro- + -scope
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for phosphoroscope

phosphoroscope

noun
  1. an instrument for measuring the duration of phosphorescence after the source of radiation causing it has been removed
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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