# photoentrainment

> English word · Noun

## Definitions
1. The entrainment of an organism's circadian rhythm to the pattern of light and dark in its environment

## Etymology
From photo- + entrainment.

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