Source : Webster's Revised Unabridged Dictionary (1913)

Telegraphone \Te*leg"ra*phone\, n. [Gr. th^le far + -graph + ?
   sound.]
   An instrument for recording and reproducing sound by local
   magnetization of a steel wire, disk, or ribbon, moved against
   the pole of a magnet connected electrically with a telephone
   receiver, or the like.