1Electrical Engineering a distribution system in which a number of feeders or substations are each connected directly to a main substation.
2Electricity a domestic circuit in which sockets or appliances are separately connected to a central fuse box or supply (in contrast with a ring circuit).
Origin
1920s.
Definition of radial circuit in US English:
radial circuit
noun
1Electrical Engineering a distribution system in which a number of feeders or substations are each connected directly to a main substation.
2Electricity a domestic circuit in which sockets or appliances are separately connected to a central fuse box or supply (in contrast with a ring circuit).