Relating to musical harmony or having a pleasing combination of elements.
From Greek 'harmonikos' meaning 'musical' or 'fitting together', from 'harmonia' (joint, agreement). The concept expanded from music to describe any pleasing proportional relationship in mathematics and physics.
Harmonic frequencies create the 'color' of musical instruments—a guitar and piano playing the same note sound different because of their unique harmonic signatures. The mathematical ratios that create pleasant harmonies appear throughout nature, from flower petals to planetary orbits.
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