1. 
   pentode
   [n] - a thermionic tube having five electrodes
   Found op http://www.webdictionary.co.uk/definition.php?query=pentode
   
   
2. 
   Pentode
   A multi-grid radio valve (or tube) with five electrodes (anode, cathode, control grid, screen grid, suppressor grid), commonly used in high-end audio preamplifiers, ham radios and assorted other electronic circuits.
   Found op http://www.mhs.ox.ac.uk/marconi/collection/glossary.php
   
   
3. 
   pentode
   noun a thermionic tube having five electrodes
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=pentode
   
   
4. 
   pentode
   vacuum-type electron tube with five electrodes. Besides the cathode filament, anode plate, and control grid of the triode and the added screen grid ... [2 related articles]
   Found op http://www.britannica.com/eb/a-z/p/40
   
   
5. 
   Pentode
   A pentode is an electronic device having five active electrodes. The term most commonly applies to a three-grid vacuum tube (thermionic valve), which was invented by the Dutchman Bernhard D.H. Tellegen in 1926. Pentodes (termed "triple-grid amplifiers" in some early literature) are closely related ...
   Found op http://en.wikipedia.org/wiki/Pentode
   
   
6. 
   pentode
   a five-electrode electronic tube containing an anode, a cathode, a control electrode, and two additional electrodes, usually a screen grid and a suppressor grid
   Found op http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=531-31-04
   
   
7. 
   pentode
   pentode: see electron tube.
   Found op http://www.infoplease.com/ce6/sci/A0917328.html
   
   
8. 
   Pentode
   A pentode is an electronic amplifying valve with five main electrodes.
   Found op http://www.probertencyclopaedia.com/browse/GP.HTM
   
   
9. 
   pentode
   1) Electron tube 2) Electronic amplifying valve with 5 main electrodes 3) Thermionic tube 4) Thermionic vacuum tube 5) Thermionic valve 6) Tube 7) Vacuum tube
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/pentode/1
   
   

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