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columbium

[kuh-luhm-bee-uh m] /kəˈlʌm bi əm/
noun, Chemistry
1.
(formerly) niobium. Symbol: Cb.
Origin
1801
1801; Columb(ia) (def 7) + -ium
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for columbium

columbium

/kəˈlʌmbɪəm/
noun
1.
the former name of niobium
Word Origin
C19: from New Latin, from Columbia, the United States of America
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Encyclopedia Article for columbium

Nb

chemical element, refractory metal of Group Vb of the periodic table, used in alloys, tools and dies, and superconductive magnets. Niobium is closely associated with tantalum in ores and in properties.

Learn more about Nb with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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