harmonic
     adj 1: of or relating to harmony as distinct from melody and
            rhythm; "subtleties of harmonic change and tonality"-
            Ralph Hill [ant: {nonharmonic}]
     2: of or relating to the branch of acoustics that studies the
        composition of musical sounds; "the sound of the
        resonating cavity cannot be the only determinant of the
        harmonic response"
     3: relating to vibrations that occur as a result of vibrations
        in a nearby body; "sympathetic vibration" [syn: {sympathetic}]
     4: involving or characterized by harmony [syn: {consonant}, {harmonical},
         {harmonized}, {harmonised}, {in harmony}]
     n : a tone that is a component of a complex sound
Source: WordNet® 2.0