An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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quadrupole moment
  گشتاور ِ چهارقطبه  
gaštâvar-e cahârqotbé
Fr.: moment quadrupolaire  

A quantity characterizing an electric charge distribution, determined by the product of the charge density, the second power of the distance from the origin, and a spherical harmonic over the charge distribution.

See also: → quadrupole; → moment.