An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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pole of a mirror
  قطب ِ آینه  
qotab-e âyene
Fr.: pôle de mirroir  

The point where the → principal axis passes through the mirror.

See also: → pole; → mirror.