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Definition of irradiance noun from the Oxford Advanced Learner's Dictionary

irradiance

noun
 
/ɪˈreɪdiəns/
 
/ɪˈreɪdiəns/
[uncountable] (physics)
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  1. a measurement of the amount of light that comes from something
See irradiance in the Oxford Advanced American Dictionary
efficacy
noun
 
 
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