thermometer
n. countable A2 Elementary US //θɝˈmɑmətɝ// UK //θɜːmˈɒmɪtɐ// ther·mome·ter
n. a tool used to measure how hot or cold something is. You use it to check the weather or to see if you have a fever.
n. an instrument for measuring and indicating temperature, typically consisting of a narrow, sealed glass tube marked with graduations and containing at its lower end a bulb of mercury or alcohol.
The thermometer shows that it is thirty degrees outside.
The nurse placed the digital thermometer under the patient's tongue to check for a fever.
Advanced infrared thermometers allow medical professionals to obtain accurate body temperature readings without making physical contact, which is essential for maintaining hygiene in busy clinics.
Borrowed from French thermomètre; equivalent to thermo- + -meter.