tokamak

noun

to·​ka·​mak ˈtō-kə-ˌmak How to pronounce tokamak (audio) ˈtä- How to pronounce tokamak (audio)
variants or less commonly tokomak
: a toroidal device for producing controlled nuclear fusion that involves the confining and heating of a gaseous plasma by means of an electric current and magnetic field

Examples of tokamak in a Sentence

Recent Examples on the Web Within the tokamak, the magnets confine plasmas — a state of matter with large quantities of ionized particles — at 10 times the temperature of the sun. Rob Nikolewski, San Diego Union-Tribune, 24 May 2024 Earlier this year, the Korea Institute of Fusion Energy installed a tungsten diverter in its KSTAR tokamak, replacing the device’s carbon diverter. Isaac Schultz / Gizmodo, Quartz, 6 May 2024 The tokamak is lined with strong magnets that hold the plasma in. Angela Dewan, CNN, 8 Feb. 2024 What the scientists are doing in South Korea will feed into the development of the International Thermonuclear Experimental Reactor in southern France, known as ITER, the world’s biggest tokamak which aims to prove the feasibility of fusion. Laura Paddison, CNN, 1 Apr. 2024 Different Designs Setups for magnetic-confinement fusion are not necessarily limited to tokamaks. Philip Ball, Scientific American, 16 May 2023 In a tokamak or a stellarator, the hot plasma is limited to a density of 10 14 deuterons per cubic centimeter. Bayarbadrakh Baramsai, IEEE Spectrum, 27 Feb. 2022 An animation showing how tokamaks generate nuclear fusion energy. Angela Dewan, CNN, 8 Feb. 2024 In the 1950s, scientists created various magnetic-confinement fusion devices, the most well known of which were Andrei Sakharov’s tokamak and Lyman Spitzer’s stellarator. Bayarbadrakh Baramsai, IEEE Spectrum, 27 Feb. 2022

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'tokamak.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

Russian, from toroidal'naya kamera s aksial'nym magnitnym polem (toroidal chamber with an axial magnetic field)

First Known Use

1965, in the meaning defined above

Time Traveler
The first known use of tokamak was in 1965

Dictionary Entries Near tokamak

Cite this Entry

“Tokamak.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tokamak. Accessed 7 Jun. 2024.

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