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pentode Syllabification: pen·tode
Pronunciation: /ˈpen(t)ōd/

Definition of pentode in English:


A thermionic tube having five electrodes.
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'.

Definition of pentode in:

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