An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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random thermal motion
  جنبش ِ گرمایی ِ کاتوره  
jonbeš-e garmâyi-ye kâturé
Fr.: mouvement thermique aléatoire  

The agitated motion of molecular, atomic, or → subatomic particles in all possible directions at any temperature, except at → absolute zero, where → thermal motion would cease.

See also: → random; → thermal; → motion.