anharmonic

[ an-hahr-mon-ik ]
/ ˌæn hɑrˈmɒn ɪk /

adjective Physics.

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

Origin of anharmonic

an-1 + harmonic; modeled on French anharmonique

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