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nebulium

[ nuh-byoo-lee-uhm ]

noun

, Astronomy.
  1. 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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Word History and Origins

Origin of nebulium1

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

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

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

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