An Etymological Dictionary of Astronomy and Astrophysics

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Lyman limit
  حد ِ لایمن  
hadd-e Lyman
Fr.: limite de Lyman  

The short-wavelength end of the hydrogen Lyman series, at 912 Å. Also called → Lyman continuum. It corresponds to the energy (13.6 eV) required for an electron in the hydrogen ground state to jump completely out of the atom, leaving the atom ionized.

See also: → Lyman; → limit.