# Siegbahn unit

> English word · Noun

## Definitions
1. Synonym of x unit.

## Etymology
Originally defined by the Swedish physicist Manne Siegbahn (1886–1978) in 1925.

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