• synonyms


[kuh-luhm-bee-uh m]
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noun Chemistry.
  1. (formerly) niobium.Symbol: Cb
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Origin of columbium

1801; Columb(ia) (a literary name for the United States of America) + -ium
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for columbium


  1. the former name of niobium
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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