\Coun"ter ten`or\ (t?n`?r). [OF. contreteneur. Cf.
{Contratenor}, and see {Tenor} a part in music.] (Mus.)
One of the middle parts in music, between the tenor and the
treble; high tenor.
{Counter-tenor clef} (Mus.), the C clef when placed on the
   third line; -- also called {alto clef}.