Meanings
nouncoronium (uncountable)
- historicaluncountableA supposed chemical element, hypothesized in the 19th century in order to explain a green emission line seen during the total solar eclipse of 7 August 1869 (actually highly ionized iron).
Origin
From corona + -ium, coined by a certain A. Gruenwald.
Full word history & related roots →Cite this entry
APA
coronium. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/coronium
MLA
“coronium.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/coronium. Accessed November 2, 2026.
Chicago
WatkinsX Dictionary, s.v. “coronium,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/coronium.
Source: coronium on Wiktionary, CC BY-SA 4.0.