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Dianium

Source : Webster's Revised Unabridged Dictionary (1913)

Dianium \Di*a"ni*um\, n. [NL., fr. L. Diana; either as the name
   of the Roman goddess, or from its use in OE. as a name of
   silver.] (Chem.)
   Same as {Columbium}. [Obs.]
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