niobium

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ni·o·bi·um

 (nī-ō′bē-əm)
n. Symbol Nb
A silvery, soft, rare, ductile metallic element that occurs chiefly in columbite-tantalite and is used in steel alloys, arc welding, and superconductive materials. Atomic number 41; atomic weight 92.906; melting point 2,477°C; boiling point 4,744°C; specific gravity 8.57; valence 2, 3, 5. See Periodic Table.

[After Niobe (so called because it is extracted from tantalite).]

niobium

(naɪˈəʊbɪəm)
n
(Elements & Compounds) a ductile white superconductive metallic element that occurs principally in columbite and tantalite: used in steel alloys. Symbol: Nb; atomic no: 41; atomic wt: 92.90638; valency: 2, 3, or 5; relative density: 8.57; melting pt: 2469±10°C; boiling pt: 4744°C. Former name: columbium
[C19: from New Latin, from Niobe (daughter of Tantalus), so named because it occurred in tantalite]

ni•o•bi•um

(naɪˈoʊ bi əm)

n.
a steel-gray metallic element resembling tantalum in its chemical properties; becomes a superconductor below 9 K; used chiefly in alloy steels. Symbol: Nb; at. no.: 41; at. wt.: 92.906; sp. gr.: 8.4 at 20°C.
[1835–45; < New Latin; see Niobe, -ium2]

ni·o·bi·um

(nī-ō′bē-əm)
Symbol Nb A soft, silvery, easily shaped metallic element that usually occurs in nature together with the element tantalum. It is used to build nuclear reactors, to make steel alloys, and to allow magnets to conduct electricity with almost no resistance. Atomic number 41. See Periodic Table.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.niobium - a soft grey ductile metallic element used in alloysniobium - a soft grey ductile metallic element used in alloys; occurs in niobite; formerly called columbium
metal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
columbium - a former name for niobium
columbite, niobite - a black mineral that is an ore of niobium and tantalum
Translations
ниобий
niob
niobium
nioobium
niobiniobium
niobij
nióbium
ニオブ
niobis
niob
niobiu
niobij
niob
niyobyum
niobi

niobium

[nɑɪˈəʊbɪəm] Nniobio m

niobium

n (Chem) → Niob nt