# normal hydrogen

> English word · Noun

## Definitions
1. Synonym of protium (“"the usual isotope of hydrogen"”).

## Etymology
So named because it is the usual isotope of hydrogen, having one nucleon (a single proton and no neutrons).

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