- 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.
Origin of coronium
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for coronium
This unknown element has received for the time being the name of "Coronium."Astronomy of To-day
Cecil G. Dolmage
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
At the supper table Wade and Arcot reported to the others the curious constants they had discovered for coronium.
I took a coronium hack saw that will eat through molybdenum steel like so much cheese, and it just wore its teeth off.
The name “coronium” has therefore been given to the supposed gas which forms it.