| NOUN | substance | atomic number 41, niobium, Nb | a soft grey ductile metallic element used in alloys |
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| Meaning | A soft grey ductile metallic element used in alloys; occurs in niobite; formerly called columbium. | |
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| Synonyms | niobium, Nb | |
| Narrower | columbium | A former name for niobium |
| Broader | metallic element, metal | Any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc. |
| Substance of | niobite, columbite | A black mineral that is an ore of niobium and tantalum |
| Spanish | niobio, número atómico 41 | |
| Catalan | Nb, niobi, número atòmic 41 | |
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