thermalindicator
nounUK /ˈθɜːməl ˈɪndɪkeɪtə/
US /ˈθɜːrməl ˈɪndɪkeɪtər/
A thermal indicator is a thing that shows you how hot or cold something is.
The thermal indicator on the bottle turned blue, so we knew the milk was cold.
RELATED WORDS
OTHER MEANINGS
2. A small sticker or strip that changes color to show temperature.
Stick a thermal indicator on the fish tank to check the water.
3. A device in machines that warns when they get too hot.
The thermal indicator light came on, so the computer fan started working.
4. A mark or sign used in science to show heat levels.
The scientist used a thermal indicator to record the oven's heat.