Columbium

 : 
Noun
 : 
co=lum=bi=um

WORDNET DICTIONARY

Noun Columbium has 1 sense

CIDE DICTIONARY

Columbiumn. [NL., fr. Columbia America.].
     A rare element of the vanadium group, first found in a variety of the mineral columbite occurring in Connecticut, probably at Haddam. Atomic weight 94.2. Symbol Cb or Nb. Now more commonly called niobium.  [1913 Webster]

OXFORD DICTIONARY

Columbium, n. US Chem. = NIOBIUM.


For further exploring for "Columbium" in Webster Dictionary Online


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