coronium
Noun. A supposed chemical element, hypothesized in the 19th century in order to explain a green emission line seen during a solar eclipse (actually highly ionized iron).This is an unmodified, but possibly outdated, definition from Wiktionary and used here under the Creative Commons license. Wiktionary is a great resource. If you like it too, please donate to Wikimedia.
This entry was last updated on RefTopia from its source on 3/20/2012.