Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Radial constriction of flowing plasma or other matter carrying an electric current, caused by the magnetic field that is produced by the current.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun physics the magnetic self-attraction of parallel electric currents having the same direction; the restriction of a flowing plasma because of this attraction

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