Definitions
Gray metal used in strong alloys and superconducting materials.
Word origin
From Niobe + -ium, because of the element's affinity with tantalum, named after Niobe's father Tantalus.
Used in a sentence
“One should use hypoallergenic jewelry made of surgical grade stainless steel, titanium, 14- or 18-karat gold, or niobium, especially for initial piercings.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Superalloy metal”7 letters
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