celtium

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noun

The name originally proposed for element 72, now called hafnium; the discoverer, Georges Urbain, conjectured it to be a rare earth element, and proposed the symbol Ct; but subsequent work showed it to be a transition element, and hafnium was given the symbol Hf.

Scrabble 11
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Meanings

nounceltium (uncountable)
  1. historicaluncountableThe name originally proposed for element 72, now called hafnium; the discoverer, Georges Urbain, conjectured it to be a rare earth element, and proposed the symbol Ct; but subsequent work showed it to be a transition element, and hafnium was given the symbol Hf.

Synonyms & antonyms

Also see
hafnium
Cite this entry
APA

celtium. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/celtium

MLA

“celtium.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/celtium. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “celtium,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/celtium.

Source: celtium on Wiktionary, CC BY-SA 4.0.