Webster's Revised Unabridged Dictionary · 1913

Anharmonic

Anharmonic ({not transcribed}) , adjective

[French anharmonique, from Greek 'an priv. + {not transcribed} harmonic.]

(Mathematics) Not harmonic.
Collocations (1)
anharmonic function or anharmonic ratio , the quantity (ac/ad):(bc/bd), where the segments are to be regarded as plus or minus, according to the order of the letters.