The viola clef, also known as the C clef, is a symbol used in music notation to denote the position of notes on the staff. However, it is not the only symbol that can be used in this way. Some synonyms for the viola clef include the alto clef, which is also used for the viola but is shaped differently, the baritone clef, which is used for baritone and bass instruments, and the tenor clef, which is used for tenor instruments like the cello. Other symbols, such as the treble clef and bass clef, are used for high and low instruments respectively.