# rutherfordium

> English word · Noun · IPA /ˌɹʌðəɹˈfɔːɹdiəm/

## Definitions
1. A transuranic chemical element (symbol Rf) with an atomic number of 104.
2. A rejected name for seaborgium.
3. A rejected name for lawrencium.

## Etymology
From Rutherford + -ium, named for Ernest Rutherford.

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