\Pho"no*graph\, n. [Phono- + -graph.]
1. A character or symbol used to represent a sound, esp. one
   used in phonography.
2. (Physics) An instrument for the mechanical registration
   and reproduction of audible sounds, as articulate speech,
   etc. It consists of a rotating cylinder or disk covered
   with some material easily indented, as tinfoil, wax,
   paraffin, etc., above which is a thin plate carrying a
   stylus. As the plate vibrates under the influence of a
   sound, the stylus makes minute indentations or undulations
   in the soft material, and these, when the cylinder or disk
   is again turned, set the plate in vibration, and reproduce
   the sound.