# phoneidoscope

> English word · Noun

## Definitions
1. An instrument for studying the motions of sounding bodies by optical means. It consists of a tube across whose end is stretched a film of soap solution thin enough to give coloured bands, whose form and position are affected by sonorous vibrations.

## Etymology
From phono- + Ancient Greek εἶδος (eîdos, “sight”) + -scope.

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