coronium means A 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). Lexicurio rates it Sui generis — a strength score of 87 out of 100.
noun
- A 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).