Noun:

1. a clef that puts middle C on the fourth line of the staff; used for writing music for bassoons or cellos or tenor horns

tenorn.大意；要旨；常规；男高音；次中音乐器；（票据或支票的）期限adj.(乐器)次中音的；(组钟中的)最低音的；男高音的n.[语]本体Tenora特诺拉