# Galileo thermometer

> English word · Noun

## Definitions
1. A thermometer made of a sealed glass cylinder containing a clear liquid and several glass vessels of varying densities. As temperature changes, the individual floats rise or fall in proportion to their respective density.

## Etymology
Named after Galileo Galilei, who discovered the principle on it is based: that the density of a liquid changes in proportion to its temperature.

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