aSyntonic(Physics) Of or pert. to syntony; specif., designating, or pert. to, a system of wireless telegraphy in which the transmitting and receiving apparatus are in syntony with, and only with, one another.
Century Dictionary and Cyclopedia
syntonicSame as syntonous.
syntonicIn electricity, swinging together, or in resonance with each other, as the sender and the receiver in selective wireless telegraphy; pertaining to, or exhibiting, syntonism.
Professor Braun's syntonic system, the receiver and transmitter of which have been described, is also in one form a non-earthed system.
"Hertzian Wave Wireless Telegraphy" by John Ambrose Fleming