counter tenor

from The Collaborative International Dictionary of English v.0.48

Counter tenor \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.
   [1913 Webster]

   {Counter-tenor clef} (Mus.), the C clef when placed on the
      third line; -- also called {alto clef}.
      [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

Counter \Coun"ter\, n. [See {Counter}, adv., {Contra}.]
   1. (Naut.) The after part of a vessel's body, from the water
      line to the stern, -- below and somewhat forward of the
      stern proper.
      [1913 Webster]

   2. (Mus.) Same as {Contra}. Formerly used to designate any
      under part which served for contrast to a principal part,
      but now used as equivalent to {counter tenor}.
      [1913 Webster]

   3. (Far.) The breast, or that part of a horse between the
      shoulders and under the neck.
      [1913 Webster]

   4. The back leather or heel part of a boot.
      [1913 Webster]