# roentgenium

> English word · Noun · IPA /ɹɛntˈɡɛniəm/

## Definitions
1. A transuranic chemical element (symbol Rg) with atomic number 111.

## Etymology
From Roentgen + -ium. Named after Wilhelm Roentgen.

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