Coronium

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Coronium \Co*ro"ni*um\, n. [NL. See {Corona}.] (Chem. & Astron.)
     The principal gaseous substance forming the solar corona,
     characterized by a green line in the coronal spectrum.
     [Webster 1913 Suppl.]