Anharmonic
Pronunciation : An`har*mon"ic
Part of Speech : a.
Etymology : [F. anharmonique, fr. Gr. (Math.)
Definition : Defn: Not harmonic. The anharmonic function or ratio of four points abcd on a straight line is the quantity (ac/ad):(bc/bd), where the segments are to regarded as plus or minus, according to the order of the letters.
Source : Webster's Unabridged Dictionary, 1913