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Meaning of thermal noise

ther'mal noise'

Pronunciation: [key]
— Thermodynam., Thermodynam.,Elect.
  1. a wide spectrum of electromagnetic noise appearing in electronic circuits and devices as a result of the temperature-dependent random motions of electrons and other charge carriers. Cf.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.