thermometer
/θəˈmɒmɪtə/ · ther·mom·e·ter
noun
- An apparatus used to measure temperature. The doctor used a thermometer to check the patient's fever.
noun
- A device that indicates temperature changes, often used in scientific experiments. The thermometer in the laboratory showed a sudden drop in temperature.
Did you know? The first thermometer was invented by Italian scientist Santorio Santorio in 1612, using a water-based device to measure temperature.