An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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velocity dispersion
  پاشش ِ تندا  
pâšeš-e tondâ
Fr.: dispersion de vitesses  

The → standard deviation of a velocity → distribution. It indicates how objects of
the sample move relative to one another. Objects with similar velocities have a small velocity dispersion, whereas objects with very different velocities have a large velocity dispersion.

See also: → velocity; → dispersion.