Definition of "anharmonic" []

• Not harmonic; perturbed harmonic. (adjective)

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• "Some of his works had a lasting effect on the whole development of statistical physics; I mean not only his study of the deduction of a "master equation" for anharmonic systems, but also his fundamental contribution on phase transitions, which was to lead to the branch of statistical mechanics that deals with so-called"
• "This first study by van Hove was restricted to weakly coupled anharmonic systems."
• "Use the pendulum to find the value of g on planet X. Notice the anharmonic behavior at large amplitude."