metaldetector
nounUK /ˈmɛtəl dɪˌtɛktə/
US /ˈmɛtəl dɪˌtɛktər/
A metal detector is a machine that beeps when it finds metal.
The man used a metal detector to find coins on the beach.
OTHER MEANINGS
2. A device used at airports and buildings to check people for hidden metal objects.
Everyone walked through the metal detector before boarding the plane.
3. A tool used by treasure hunters to search for buried metal items.
He swept the metal detector over the sand and heard a loud beep.
4. A machine used in factories to make sure no metal pieces are in food or products.
The factory's metal detector stopped the line when it found a small screw.