D defs.my
Entry 1 sense Webster, 1913

Syntonic

· Syn·ton·ic · IPA /sɪnˈtɒnɪk/
01 a. Of or pert. to syntony; specif., designating, or pert. to, a system of wireless telegraphy in which the transmitting and receiving apparatu…
  1. 1.
    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.(Physics)