niobium
noun
ni·o·bi·um
nī-ˈō-bē-əm 
: a lustrous light gray ductile metallic element that resembles tantalum chemically and is used in alloys see Chemical Elements Table
Examples of niobium in a Sentence
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The team tested the method on six different MXenes, including titanium carbide, niobium carbide, vanadium carbide, tantalum carbide, and titanium carbonitride.
—
Aamir Khollam, Interesting Engineering, 30 Jan. 2026
Tantalum, niobium, aluminum and gallium are all deemed critical minerals by the USGS.
—John Towfighi, CNN Money, 11 Jan. 2026
This means the cable only requires two connectors—one at the top of the fridge and another at the transition from silver to niobium-titanium.
—IEEE Spectrum, 8 Dec. 2025
Among other things, the Rwandans have been said to secretly transport niobium from a mine near Goma across the border and then export it.
—Jon Lee Anderson, New Yorker, 24 Nov. 2025
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Aamir Khollam, Interesting Engineering, 30 Jan. 2026
Tantalum, niobium, aluminum and gallium are all deemed critical minerals by the USGS.
—John Towfighi, CNN Money, 11 Jan. 2026
This means the cable only requires two connectors—one at the top of the fridge and another at the transition from silver to niobium-titanium.
—IEEE Spectrum, 8 Dec. 2025
Among other things, the Rwandans have been said to secretly transport niobium from a mine near Goma across the border and then export it.
—Jon Lee Anderson, New Yorker, 24 Nov. 2025
See All Example Sentences for niobium
Cite this Entry
“Niobium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/niobium. Accessed 6 Feb. 2026.
Copy CitationKids Definition
niobium
noun
ni·o·bi·um
nī-ˈō-bē-əm
: a shiny gray metallic element used in alloys see element
Medical Definition
niobium
noun
ni·o·bi·um
nī-ˈō-bē-əm
: a lustrous light gray ductile metallic element that resembles tantalum chemically and is used in alloys
—symbol Nb
called also columbium
see Chemical Elements TableLove words? Need even more definitions?
Merriam-Webster unabridged
