An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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conservation of matter
  پتایش ِ ماده  
patâyeš-e mâddé
Fr.: conservation de matière  

Same as → conservation of mass.

See also: → conservation; → matter.