1. 
   dynode
   (from the article `mass spectrometry`) ...principle of the multiplier is, as the name suggests, a multiplication of the number of electrons emerging from an electrode as compared with the ... ...has a second component that multiplies the number of electrons by a factor of typically 105 or 106. The e...
   Found op http://www.britannica.com/eb/a-z/d/88
   
   
2. 
   Dynode
   A dynode is one of a series of electrodes within a photomultiplier tube. Each dynode is at a more positive electrical potential than its predecessor. Secondary emission occurs at the surface of each dynode. Such an arrangement is able to amplify the tiny current emitted by the photocathode, typical...
   Found op http://en.wikipedia.org/wiki/Dynode
   
   
3. 
   dynode
   secondary-emission electrode placed and operated relative to other electrodes so that the number of secondary electrons leaving its surface exceeds the number of primary electrons incident upon it
   Found op http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=394-30-14
   
   
4. 
   dynode
   a secondary-emission electrode so placed and operated relative to other electrodes that the number of secondary electrons leaving its surface exceeds the number of primary electrons incident upon it
   Found op http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=531-21-12
   
   
5. 
   dynode
   the anodes which are used to amplify the signal in photomultiplier tubes.
   Found op http://www.chemistry-dictionary.com/definition/dynode.php
   
   

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