# photomultiplier

> English word · Noun

## Definitions
1. A device, normally in the form of a tube, that uses a photocathode to convert photons into photoelectrons which are then amplified.

## Etymology
From photo- + multiplier.

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