niobium Syllabification: (ni·o·bi·um)Pronunciation: /nīˈōbēəm/Definition of niobium noun the chemical element of atomic number 41, a silver-gray metal of the transition series, used in superconducting alloys. (Symbol: Nb)Origin: mid 19th century: modern Latin, from Niobe, by association with her father Tantalus (so named because the element was first found in tantalite)niobium in other Oxford dictionaries Definition of niobium in the British & World English dictionary
