metal detector

plural metal detectors

Definition of metal detector

: a device that detects the presence of hidden metal: such as
a : a security device that scans individuals for dangerous objects (such as weapons) I boarded the plane armed with several frying thermometers, which set off the metal detector— Jeffrey Steingarten Once inside the theater, the crowd had to pass through an airport-style metal detector as a security precaution.— Richard Zoglin
b : a handheld apparatus that uses electrical induction (see induction sense 4c) to detect the presence of metallic objects (such as coins or jewelry) buried a short distance underground A local man using a metal detector stumbled upon the site last March. He found two copper brooches, or pins, measuring four inches across.Time for Kids

First Known Use of metal detector

1880, in the meaning defined above

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The first known use of metal detector was in 1880

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a period when something is suspended

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