Detector
/dɪˈtɛktər/
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Definition
(noun) A device capable of registering a specific substance or physical phenomenon, and that optionally sounds an alarm or triggers a warning.
Sentence Examples
My neighbor found a cache of ancient Roman coins using his metal detector.
The results of a lie detector test are inadmissible in court.
CEFR Practice Quiz
My neighbor found a cache of ancient Roman coins using his metal ____.