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Answer for the clue "A thermionic tube having five electrodes ", 7 letters:
pentode

Alternative clues for the word pentode

Word definitions for pentode in dictionaries

WordNet Word definitions in WordNet
n. a thermionic tube having five electrodes

Wikipedia Word definitions in Wikipedia
A pentode is an electronic device having five active electrodes . The term most commonly applies to a three-grid amplifying vacuum tube (thermionic valve), which was invented by Gilles Holst and Bernhard D.H. Tellegen in 1926. The pentode consists of an ...

Wiktionary Word definitions in Wiktionary
n. a thermionic valve similar to a tetrode with the addition of a suppressor grid; was used in high quality audio and radio products

Usage examples of pentode.

She ran to the racks of glowing and humming pentodes on the far wall, throwing her arms wide as if to hide them from sight.