detector
/dɪˈtɛktər/
noun
- A device or instrument that finds or measures something, such as smoke, metal, or radiation.
- A carbon monoxide detector can save your life by alerting you to dangerous gas.
- Beachcombers use metal detectors to find coins and jewelry in the sand.
- The smoke detector went off when the toast burned.
- A person or thing that discovers or identifies something.
- She is a good detector of lies and can tell when someone is not being honest.
- The dog is an excellent detector of hidden treats.
- His ear is a fine detector of false notes in music.