Meaning & use
Thermoscope
Last updated
An early scientific instrument that indicated changes in temperature without providing a numerical measurement, a forerunner of the modern thermometer.
See it in a sentence
Galileo is often credited with building one of the first thermoscopes around 1600.
The museum displays a reconstructed thermoscope alongside early thermometers.
A note on using this word
Unlike a thermometer, a thermoscope shows that temperature is changing but not by how many degrees, since it lacked a numbered scale.
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