# photointerrupter

> English word · Noun

## Definitions
1. An optical device that acts as a switch when a beam of light is blocked by a foreign object

## Etymology
From photo- + interrupter.

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