noun ne·bu·li·um \nə̇ˈbyülēəm, neˈ-\

Definition of nebulium



  1. :  a hypothetical chemical element formerly inferred from certain lines in the spectra of nebulae now believed to arise from transitions in oxygen and nitrogen that are forbidden under ordinary laboratory conditions

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Origin and Etymology of nebulium

New Latin, from nebula + -ium

Seen and Heard

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a brief usually trivial fact

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