An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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metallicity distribution function (MDF)
  کریای ِ واباژش ِ فلزیگی  
karyâ-ye vâbâžeš-e felezigi
Fr.: fonction de distribution de métallicité  

A plot representing the number of stars (or systems) per
metallicity interval, usually expressed in [Fe/H] (abundance of → iron relative to → hydrogen).

See also: → metallicity; → distribution; → function.