An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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electrostatic wave
  موج ِ برق‌ایستا  
mowj-e barqistâ
Fr.: onde électrostatique  

In a → plasma, a disturbance that is devoid of magnetic field, and hence can be expressed by an electrostatic potential.
The electric field is always parallel to the propagation vector, so that the electrostatic wave is → longitudinal.

See also: → electrostatic; → wave.