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ni·o·bi·um
 niobium
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- pronunciation:
- naI
o
bi
 m
- features:
- Word Combinations (noun)
| part of speech: |
noun |
| definition: |
a chemical element that has forty-one protons in each nucleus and that occurs in pure form as a dense, soft, shiny bluish white solid metal, used esp. in alloys of steel to add strength; columbium. (symbol: Nb)
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