# photohydrogen

> English word · Noun

## Definitions
1. hydrogen produced (along with oxygen) by the photolytic decomposition of water in certain anaerobic algae etc

## Etymology
From photo- + hydrogen.

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