from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A doughnut-shaped chamber used in fusion research in which a plasma is heated and confined by magnetic fields.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A toroidal chamber in which a plasma is magnetically confined; used in nuclear fusion research.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a doughnut-shaped chamber used in fusion research; a plasma is heated and confined in a magnetic bottle
Russian, from to(roidal'naya) kam(era s) ak(sial'nym magnitnym polem), toroidal chamber with axial magnetic field.(American Heritage® Dictionary of the English Language, Fourth Edition)
A transliteration of Russian токамак, an acronym of тороидальная камера в магнитных катушках (toroidal chamber with magnetic coils). (Wiktionary)