A soft grey ductile metallic element used in alloys; occurs in niobite; formerly called columbium
A later name of columbium. See
Noun
a soft gray ductile metallic element used in alloys; occurs in niobite; formerly called columbium
n.
A later name of columbium. See Columbium.
Niobium
A later name of columbium. See
Usage Examples
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