An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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LS coupling
  جفتش ِ LS، جفسری ِ ~  
jofteš-e LS, jafsari-ye ~
Fr.: couplage LS  

Same as → Russell-Saunders coupling.

See also: L referring to the total → orbital angular momentum and S to the total → spin angular momentum; → coupling.