单词	metal detector
释义	metal detector noun plural metal detectors : 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 Word History First Known Use 1880, in the meaning defined above
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