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actinometry

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WordNet Dictionary
 
 Definition: [n]  measuring the intensity of electromagnetic radiation (especially of the sun's rays)
 
 See Also: measure, measurement, measuring, mensuration

 

 

Webster's 1913 Dictionary
 
 Definition: 
\Ac`ti*nom"e*try\, n.
1. The measurement of the force of solar radiation. --Maury.

2. The measurement of the chemical or actinic energy of
   light. --Abney.

 

 

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