Word:

Columbium

Co`lum´bi`um
n.1.(Chem.) 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.
Noun1.columbium - a former name for niobium
atomic number 41, Nb, niobium
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Columbia tiger lily
Columbia University
Columbiad
Columbian
columbian mammoth
Columbic
Columbic acid
Columbidae
Columbier
Columbiferous
columbiform bird
Columbiformes
Columbin
Columbine
Columbite
columbite-tantalite
-- Columbium --
Columbo
Columbus
Columbus Day
Columella
Columelliform
Column
Column Address Strobe
column chromatography
column inch
Column rule
Columnar
columnar cell
columnar epithelial cell
Columnar epithelium
Columnar structure
Columnarity
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