coaxialadjective
/ˌkəʊˈæk.si.əl//ˌkoʊˈæk.si.əl/sharing an axis (= central point):
coaxial lines
a coaxial cable has two concentric wires (= wires that share a central point) to conduct the signal, separated by an insulating layer:
Cable TV channels and internet services are usually transmitted to a home or business via coaxial cable.