An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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hydrodynamic equilibrium
  ترازمندی ِ هیدروتوانیک  
tarâzmandi-ye hirdrotavânik
Fr.: équilibre hydrodynamique  

The state of a star when all its internal forces are in equilibrium. The main forces are gas pressure, radiation pressure due to thermonuclear fusion that tends to disrupt the star, and the opposing gravity. → hydrostatic equilibrium.

See also: → hydrodynamic; → equilibrium.