Meaning of telharmonium

tel•har•mo•ni•um

Pronunciation: (tel"här-mō'nē-um), [key]
— n.
  1. a musical keyboard instrument operating by alternating currents of electricity which, on impulse from the keyboard, produce music at a distant point via telephone lines.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.