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  1. Oxford American Dictionary

    Rydberg constant

    • IPA[ˈridˌbərɡ ˈkänstənt]
    • n.
      a constant, 1.097 x 107 m−1, which appears in the formulae for the wave numbers of lines in atomic spectra and is a function of the rest mass and charge of the electron, the speed of light, and Planck's constant.

    • noun: Rydberg constant