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Definition of Celtium
1. n. A supposed new element of the rare-earth group, accompanying lutecium and scandium in the gadolinite earths. Symbol, Ct (no period).
Definition of Celtium
1. Noun. (chemistry) A former name of hafnium. ¹
¹ Source: wiktionary.com
Lexicographical Neighbors of Celtium
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