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nebulium

[ nuh-byoo-lee-uhm ]
/ nəˈbyu li əm /
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noun Astronomy.
a hypothetical element once thought to be present in emission nebulae because of certain unidentified spectral lines, now known to be forbidden transitions of oxygen and nitrogen ions.
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Origin of nebulium

First recorded in 1895–1900; nebul(a) + -ium

Words nearby nebulium

nebris, Nebuchadnezzar, nebula, nebular hypothesis, nebulated, nebulium, nebulize, nebulizer, nebulose, nebulosity, nebulosus
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use nebulium in a sentence

  • The whole thing aglow with the green light of nebulium and blazing with the stars behind it.

    Out Around Rigel|Robert H. Wilson

  • The other element, to which he gives the name Nebulium, will have an atomic weight of 2·1.

    Are the Planets Inhabited?|E. Walter Maunder
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