diode

noun

di·​ode ˈdī-ˌōd How to pronounce diode (audio)
: an electronic device that has two electrodes or terminals and is used especially as a rectifier

Examples of diode 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.
Tunable diode laser spectroscopy brought high selectivity and fast response for online gas analysis. — Gregory Shahnovsky, Forbes.com, 7 Aug. 2026 Common culprits include interior or trunk lights staying on, aftermarket accessories, a faulty alternator diode, stuck relays, or modules not going into sleep mode. — John Paul, The Providence Journal, 1 Aug. 2026 However, that base price only gets you a version of the machine with a 10W laser diode capable of cutting over 300 thinner materials. — Andrew Liszewski, The Verge, 27 May 2026 The 7 Color Photon Rejuvenation Super LED Mask combines 352 high-quality LED diodes with advanced technologies, including Near-Infrared (NIR), to deliver a powerful, non-invasive skin care experience. — Tory Johnson, ABC News, 23 Apr. 2026 See All Example Sentences for diode

Word History

Etymology

di- + -ode

Note: The term was originated by the British physicist William Henry Eccles (1875-1966) in the journal The Electrician, vol. 82, no.16 (April 18, 1919), p. 475.

First Known Use

1919, in the meaning defined above

Time Traveler
The first known use of diode was in 1919

Phrases Containing diode

Rhymes for diode

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Browse Nearby Words

dioctyl phthalate
diode
Diodia
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Cite this Entry

“Diode.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/diode. Accessed 7 Sep. 2026.

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Kids Definition

diode

noun
di·​ode ˈdī-ˌōd How to pronounce diode (audio)
: an electronic device with two electrodes that is used especially for changing alternating current into direct current

More from Merriam-Webster on diode

Britannica.com: Encyclopedia article about diode

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