An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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tumbling motion
  جنبش ِ کلتاوی  
jonbeš-e kaltâvi
Fr.:  

The motion of a solid body whose rotation axis is not fixed in space. For example, that of an asteroid that does not rotate about one of their principal axes. → tumbling asteroid.

See also: → tumble; → motion.