1. niobium

noun. (ˌnaɪˈoʊbiːəm) A soft grey ductile metallic element used in alloys; occurs in niobite; formerly called columbium.
Synonyms
metal atomic number 41 columbium niobite columbite Nb metallic element
Antonyms
nonmetallic
Etymology
niobium (English)
Niobe (English)
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