# photochromogen

> English word · Noun

## Definitions
1. A microorganism (especially a mycobacterium) whose pigmentation develops following exposure to light.

## Etymology
From photo- + chromogen.

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