noun to·ka·mak \ˈtō-kə-ˌmak, ˈtä-\
variants: or less commonly


\ˈtō-kə-ˌmak, ˈtä-\

Definition of tokamak

  1. :  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

Origin and Etymology of tokamak

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

First Known Use: 1965

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