An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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orthohydrogen
  اردا-هیدروژن  
ardâ-hidrožen
Fr.: orthohydrogène  

Molecular hydrogen in which the nuclei (protons) of the two hydrogen atoms contained in the molecule have spins in the same direction. → parahydrogen

See also: → ortho-; → hydrogen.