An Etymological Dictionary of Astronomy and Astrophysics
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فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 1 Search : effective radi
effective radius
  شعاع ِ ا ُسکرمند   
šo'â'-e oskarmand

Fr.: rayon effectif   

Of a galaxy, the distance from its center within which half of the total luminosity is included.

effective; → radius.