An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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attenuation factor
  کروند ِ تنکش  
karvand-e tonokeš
Fr.: facteur d'atténuation  

The ratio of the radiation intensity after traversing a layer of matter to its intensity before.

See also: → attenuation; → factor.