anharmonic

[ an-hahr-mon-ik ]
/ ˌæn hɑrˈmɒn ɪk /

adjective Physics.

of or relating to an oscillating system that is not undergoing simple harmonic motion.

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Origin of anharmonic

an-1 + harmonic; modeled on French anharmonique
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for anharmonic

anharmonic
/ (ˌænhɑːˈmɒnɪk) /

adjective

physics of or concerned with an oscillation whose frequency is not an integral factor or multiple of the base frequency
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012