The Collaborative International Dictionary
Anharmonic \An`har*mon"ic\, a. [F. anharmonique, fr. Gr. 'an priv. + ? harmonic.] (Math.) Not harmonic.
The anharmonic function or anharmonic ratio of four points abcd on a straight line is the quantity (ac/ad):(bc/bd), where the segments are to be regarded as plus or minus, according to the order of the letters.
Wiktionary
a. Not harmonic; perturbed harmonic.
Usage examples of "anharmonic".
Their excessively mercantile mind-set has generated a very anharmonic planetary aura.
Silver-seam, Bird-cloud, Star of the Mountain, and so forth returned the song in a series of aching anharmonics: "Discontinuity.
Though some sang that a debt incurred before a viggy became Prime Priest might not be binding on all troupes, this was a minority voice, which became only a haunting anharmonic in the finished song.
At the end he closed with a strange anharmonic cadence that I liked rather better than the Joplin original.
Sometimes he sang light, quick songs that brought laughter to the rhmei, sometimes very long ones that were interrupted with cups of telise to give Kta's voice a rest, songs to which all the house listened in sober silence, plaintive and haunting melodies of anharmonic notes.