clef

a musical notation written on a staff indicating the pitch of the notes following it

• treble clef, G clef — a clef that puts the G above middle C on the second line of a staff
• bass clef, F clef — a clef that puts the F below middle C on the fourth line of a staff
• alto clef, viola clef — a clef that puts middle C on the third line of a staff
• C clef — a movable clef that puts middle C on one of the lines of a staff
• soprano clef — a clef that puts middle C on the bottom line of the staff
• tenor clef — a clef that puts middle C on the fourth line of the staff; used for writing music for bassoons or cellos or tenor horns

• musical notation — a notation used by musicians