# Michelson-Morley experiment

> English word · Proper noun

## Definitions
1. An attempt in 1887 to detect the existence of the luminiferous aether by comparing the speed of light in perpendicular directions.

## Etymology
Named after American physicists Albert A. Michelson and Edward W. Morley, who performed the experiment.

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