An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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long-period comet
  دمدار ِ درازدوره  
domdâr-e derâz dowré
Fr.: comète à longue période  

A comet with orbital period of more than 200 years. → short-period comet;
→ periodic comet.

See also: → long; → period; → comet.