tokamak Hear it!

tokamak definition

to·ka·mak (tō′kə mak′)

noun

a reactor designed to control nuclear fusion in a plasma of ions and electrons inside a doughnut-shaped, or toroidal, magnetic bottle

Etymology: < Russ acronym for a “toroidal magnetic chamber”

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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