The term PART OF A MELODY is a four letter word, NOTE. A NOTE is a musical sound that is part of a melody. It is the basic element of music and can be used to create a variety of sounds. Notes are typically written on a staff, which is a five-line system used to represent the pitch of the notes. Notes can also be represented by symbols such as sharps, flats, and naturals. Notes can be combined to create chords, which are groups of notes played together. Notes can also be used to create different rhythms and tempos.