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coronium

[kuh-roh-nee-uh m] /kəˈroʊ ni əm/
noun, Astronomy
1.
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
1885-1890
1885-90; coron(a) + -ium
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for coronium
  • For a time people speculated that the coronal emissions were due to coronium, a potential new element found only in the sun.

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