# Geiger counter

> English word · Noun · IPA /ˈɡaɪɡə ˈkaʊntə/

## Definitions
1. A device designed to detect radioactivity and measure its intensity.
2. a feature of an RFID reader that emits a sound indicating the signal strength of an RFID tag that is being searched for.

## Etymology
Named after Hans Geiger who developed the first such device in 1908 together with Ernest Rutherford.

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