Tokamak

//ˈtəʊkəmæk// noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A torus-shaped chamber used in nuclear fusion research in which a plasma is magnetically confined.

    "Studies of electrodeless discharges in a strong longitudinal magnetic field, carried out on the stellarator and the "Tokamak", have shown that in such systems the plasma becomes unstable for currents appreciably les than the critical current of Shafranov-Kruskal."

  2. 2
    a doughnut-shaped chamber used in fusion research; a plasma is heated and confined in a magnetic bottle wordnet

Synonyms

All synonyms
stellarator

Example

More examples

"The biggest tokamak to date is under construction in France."

Etymology

Borrowed from Russian токама́к (tokamák), an acronym of то(роида́льная) ка́(мера) (с) ма(гни́тными) к(ату́шками) (to(roidálʹnaja) ká(mera) (s) ma(gnítnymi) k(atúškami), “toroidal chamber with magnetic coils”).

Related phrases

dielectric heatingnuclear fusion

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.