tokamak
noun
to·ka·mak
ˈtō-kə-ˌmak 
ˈtä-
ˈtä-
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
Although the current version is tailored to SPARC’s exhaust system, the team aims to expand its capabilities to handle exhaust systems of any shape or size, as well as other plasma-facing components within a tokamak.
—
Georgina Jedikovska, Interesting Engineering, 13 Aug. 2025
Workers assemble a frame that will hold Commonwealth Fusion's SPARC tokamak demonstration system at the company's campus in Massachusetts, in November.
—Justin Worland, Time, 17 July 2025
This friendly rivalry highlights a long-standing competition between devices called stellarators, such as the Wendelstein 7-X, and others called tokamaks, such as JET.
—Tom Metcalfe, Scientific American, 2 July 2025
An alternative to the more common tokamak, a stellarator is a device that uses magnetic fields to confine plasma in the shape of a donut, according to the U.S. Department of Energy.
—Sam Meredith, CNBC, 11 June 2025
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Georgina Jedikovska, Interesting Engineering, 13 Aug. 2025
Workers assemble a frame that will hold Commonwealth Fusion's SPARC tokamak demonstration system at the company's campus in Massachusetts, in November.
—Justin Worland, Time, 17 July 2025
This friendly rivalry highlights a long-standing competition between devices called stellarators, such as the Wendelstein 7-X, and others called tokamaks, such as JET.
—Tom Metcalfe, Scientific American, 2 July 2025
An alternative to the more common tokamak, a stellarator is a device that uses magnetic fields to confine plasma in the shape of a donut, according to the U.S. Department of Energy.
—Sam Meredith, CNBC, 11 June 2025
See All Example Sentences for tokamak
Cite this Entry
“Tokamak.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tokamak. Accessed 10 Sep. 2025.
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