An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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conjugate ray
  پرتو ِ همیوغ  
partow-e hamyuq
Fr.: rayon conjugué  

Of an optical ray, the parallel ray that passes through the center of the → optical system.

See also: → conjugate; → ray.