Syntonic

Syn‐ton″ic (?), a.(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. — Syn‐ton″ic‐al (#), a. — Syn‐ton″ic‐al‐ly, adv.