The Collaborative International Dictionary of English v.0.48:

Singing \Sing"ing\,
   a. & n. from Sing, v.
   [1913 Webster]

   Singing bird. (Zool.)
   (a) Popularly, any bird that sings; a song bird.
   (b) Specifically, any one of the Oscines.

   Singing book, a book containing music for singing; a book
      of tunes.

   Singing falcon or Singing hawk. (Zool.) See Chanting
      falcon, under Chanting.

   Singing fish (Zool.), a California toadfish (Porichthys
      porosissimus), called also midshipman; -- so called
      because it produces a buzzing sound with its air bladder.


   Singing flame (Acoustics), a flame, as of hydrogen or coal
      gas, burning within a tube and so adjusted as to set the
      air within the tube in vibration, causing sound. The
      apparatus is called also chemical harmonicon.

   Singing master, a man who teaches vocal music.

   Singing school, a school in which persons are instructed in
      singing.
      [1913 Webster]