triode

noun

tri·​ode ˈtrī-ˌōd How to pronounce triode (audio)
: an electron tube with an anode, a cathode, and a controlling grid

Examples of triode in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
With a triode horn setup like the Ojas, there is a subtle recalibration of the physical world. Sasha Frere-Jones, Harper’s Magazine , 9 Nov. 2022 Depending on how many grids the tube has, it is called a diode (no grids), a triode (one grid), a tetrode (two grids), and so on. IEEE Spectrum, 29 Oct. 2020

Word History

First Known Use

1919, in the meaning defined above

Time Traveler
The first known use of triode was in 1919

Browse Nearby Words

Cite this Entry

“Triode.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/triode. Accessed 11 Mar. 2026.

Kids Definition

triode

noun
tri·​ode ˈtrī-ˌōd How to pronounce triode (audio)
: a vacuum tube with three electrodes

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