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dynode

[dahy-nohd] /ˈdaɪ noʊd/
noun, Electronics.
1.
an electrode for the emission of secondary electrons in a vacuum tube.
Origin of dynode
1935-1940
1935-40; dyn(a)- + -ode2
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Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for dynode

dynode

/ˈdaɪnəʊd/
noun
1.
an electrode onto which a beam of electrons can fall, causing the emission of a greater number of electrons by secondary emission. They are used in photomultipliers to amplify the signal
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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dynode in Science
dynode
  (dī'nōd')   
An electrode used in certain electron tubes, especially photomultipliers, to provide secondary emission. Dynodes are arranged by increasing voltage between the cathode and anode of the tube, each attracting the cascade of electrons from the one behind it, and releasing more electrons to the next.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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