# photofermentation

> English word · Noun

## Definitions
1. fermentation that only proceeds in the presence of light; especially a process of producing hydrogen. Unlike biophotolysis in which hydrogen is produced from water, photofermentation produces hydrogen from organic substrates.

## Etymology
From photo- + fermentation.

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