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detector

[dih-tek-ter] /dɪˈtɛk tər/
noun
1.
a person or thing that detects.
2.
a device for detecting smoke, fire, or some other hazardous condition.
3.
a device for detecting the presence of metal, contraband, or other items that might be hidden or concealed.
4.
Telecommunications.
  1. a device for detecting electric oscillations or waves.
  2. a device, as a crystal detector or a vacuum tube, that rectifies the alternating current in a radio receiver.
Origin of detector
1535-1545
1535-45; < Late Latin dētēctor revealer, equivalent to Latin dēteg(ere) to uncover, reveal (see detect) + -tor -tor
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Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for detector

detector

/dɪˈtɛktə/
noun
1.
a person or thing that detects
2.
any mechanical sensing device
3.
(electronics) a device used in the detection of radio signals
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for detector
n.

1540s, from Latin detector "uncoverer, revealer," agent noun from detectus, past participle of detegere (see detect).

Online Etymology Dictionary, © 2010 Douglas Harper
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11
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