• Eightfold; specifically, of or pertaining to a device or system for sending eight simultaneous telegraphic messages over a single wire.
  • In <em>telegraphy</em>, an eightfold system; a system permitting of the simultaneous transmission of eight messages over one wire.
  • In <em>telegraphy</em>, to adjust or arrange (a telegraphic system) for the simultaneous sending of eight messages.
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