# jargonium

> English word · Noun

## Definitions
1. A rejected name for hafnium.

## Etymology
From jargon + -ium; see jargon (“a variety of zircon”). Doublet of zirconium.

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