Melody is defined as "A rhythmically organized sequence of single tones so related to one another as to make up a particular musical phrase or idea. The structure of music with respect to the arrangement of single notes in succession. Together with harmony and rhythm, melody is one of the three basic element of traitional Western music." Its Greek root meloidia signifies choral song, from melos, "tune" + oidia, "singing." The succession of single pitches comprising melodic structure is often intimately linked to underlying harmonic structure.