coronium

[ kuh-roh-nee-uhm ]

/ kəˈroʊ ni əm /

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noun Astronomy.

a hypothetical element once thought to exist because certain spectral lines in the emission spectrum of the solar corona could not be identified by known elements. These lines were subsequently found to be emitted by certain highly ionized metals.

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Origin of coronium

First recorded in 1885–90; coron(a) + -ium

Words nearby coronium

coronavirus, coroner, coronet, coroneted, coronitis, coronium, coronograph, coronoidectomy, coronoid fossa, coronoid process, coroplasty

How to use coronium in a sentence

And the extreme strength of the lux metal fiber made it stronger, pound for pound, than steel or coronium.
Islands of Space|John W Campbell
I myself believe that they were probably solid—in a way of speaking—coronium.
The Metal Monster|A. Merritt
The name “coronium” has therefore been given to the supposed gas which forms it.
Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 10|Various
The spectrum of the corona showed few bright lines besides those of coronium and hydrogen.
Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 10|Various

The slitless spectroscope showed the green line (coronium) and D3 (helium) in the coronal spectrum.
Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 10|Various