# Faraday cup

> English word · Noun

## Definitions
1. A conductive metal cup designed to catch charged particles in vacuum.

## Etymology
Named after English scientist Michael Faraday (1791–1867), who first theorized ions around 1830.

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