Definition of pentode in English:


Line breaks: pen|tode
Pronunciation: /ˈpɛntəʊd


  • A thermionic valve having five electrodes.
    More example sentences
    • The machine incorporates a pentode vacuum-tube driven as a cathode follower in a Class-A, unity-gain output stage.
    • Here is a compilation of some of the finest pentode audio tubes ever made.
    • I agree with the assumption that building large pentodes is more difficult.


early 20th century: from Greek pente 'five' + hodos 'way'.

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