Great staff
DEFINITION
This is a theoretical combination of eleven lines that encompass the bass clef and treble clef staves with the common line between them designating middle C. This Great Staff can also display the third clef ( C clef). Today, most identify the Great Staff with just the bass clef and treble clef with no common line between them and no C clef. There is more space between the staves with the line and the C clef notation being implied.