The Collaborative International Dictionary of English v.0.48:
Inharmonic \In`har*mon"ic\, Inharmonical \In`har*mon"ic*al\, a. Not harmonic; inharmonious; discordant; dissonant. [1913 Webster]WordNet (r) 3.0 (2006):
inharmonic adj 1: lacking in harmony [syn: discordant, disharmonious, dissonant, inharmonic]