An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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aplanatic lens
  عدسی ِ نابیراه  
adasi-ye nâbirah
Fr.: lentille aplanétique  

A lens designed so as to minimize both its → spherical aberration and → coma.

See also: → aplanatism; → lens.