capacitor

noun

ca·​pac·​i·​tor kə-ˈpa-sə-tər How to pronounce capacitor (audio)
: a device that is used to store electrical energy

Examples of capacitor 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.
The key upgrade on these speakers is the new capacitors used in the crossover for the drivers. Mark Sparrow, Forbes, 6 Dec. 2024 Specifically, in the corner of the LC III board, near the power supply connector, there are three capacitors nearby, C19, C21, and C22. Ars Technica, 29 Nov. 2024 Gold is abundant in the region, which also has rich deposits of rare metals such as coltan, used to make capacitors, and niobium, used to make superalloys for jet engines and hypersonic missiles. Emmet Livingstone, The Dial, 20 Mar. 2025 Eventually, that capacitor discharges, and out shoots a lightning bolt, five times hotter than the surface of the Sun. Chris Wright, The Conversation, 11 Mar. 2025 See All Example Sentences for capacitor

Word History

First Known Use

1925, in the meaning defined above

Time Traveler
The first known use of capacitor was in 1925

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Cite this Entry

“Capacitor.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/capacitor. Accessed 22 Apr. 2025.

Kids Definition

capacitor

noun
ca·​pac·​i·​tor kə-ˈpas-ət-ər How to pronounce capacitor (audio)
: a device for storing electric charge

called also condenser

Medical Definition

capacitor

noun
ca·​pac·​i·​tor kə-ˈpas-ət-ər How to pronounce capacitor (audio)
: a device giving capacitance and usually consisting of conducting plates or foils separated by thin layers of dielectric (as air or mica) with the plates on opposite sides of the dielectric layers oppositely charged by a source of voltage and the electrical energy of the charged system stored in the polarized dielectric

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