# Plücker tube

> English word · Noun

## Definitions
1. A vacuum tube, used in spectrum analysis, in which the part through which the discharge takes place is a capillary tube, thus producing intense incandescence of the contained gases.
2. A Crookes tube.

## Etymology
Named after Julius Plücker, German physicist.

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