An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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caustic curve
  خم ِ سوچان  
xam-e sucân
Fr.: courbe caustique  

The intersection of a → caustic surface with a plane passing through the beam of rays.

See also: → caustic; → curve.