niobium 1
noundomain: substance
Princeton WordNet [ver.3.1]
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EnglishDefinition
a soft grey ductile metallic element used in alloys; occurs in niobite; formerly called columbium
Hypernym
any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
any chemical element that belongs to the vanadium group.
Substance_meronym
niobite 1
noun
a black mineral that is an ore of niobium and tantalum
EnglishHyponym
columbium 1
noun
a former name for niobium
Substance_holonym
niobite 1
noun
a black mineral that is an ore of niobium and tantalum
