Meaning of nebulium in English:

nebulium

Pronunciation /nɛˈbjuːlɪəm/

noun

historical Chemistry
  • A hypothetical chemical element proposed in the 1860s to explain certain lines in the spectra of nebulae, later discovered to arise from forbidden transitions in oxygen and nitrogen ions.

    • ‘nebulium lines’

Origin

Late 19th century from nebula+ -ium.