# niobium

> English word · Noun · IPA /naɪˈoʊbiəm/ · frequency rank #63,843

## Definitions
1. A chemical element (symbol Nb) with an atomic number of 41: a light grey, crystalline, ductile transition metal used in superconducting materials.
2. A single atom of this element.

## Etymology
From Niobe + -ium, because of the element's affinity with tantalum, named after Niobe's father Tantalus.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/niobium