(from the article `clef`) and as a tenor clef (used by the trombone, cello, and bassoon), in which middle C occurs on the second line from the top: Found on http://www.britannica.com/eb/a-z/t/25
noun a clef that puts middle C on the fourth line of the staff; used for writing music for bassoons or cellos or tenor horns Found on https://www.encyclo.co.uk/local/20974