The Collaborative International Dictionary
Norwegium
Norwegium \Nor*we"gi*um\, n. [NL. See Norwegian.] (Chem.) A rare metallic element, of doubtful identification, said to occur in the copper-nickel of Norway. Not recognized as an element (1999).
Wiktionary
norwegium
n. (context obsolete English) (non-gloss definition: A rejected name for) hafnium.