Wiktionary
postnuclear
a. 1 After the discovery of nuclear energy. 2 After a nuclear war. 3 (context linguistics English) After the nucleus.
Usage examples of "postnuclear".
The theory of nuclear winter was prompted by studies of dust storms on Mars, and Mars gives us a plausible vision of a postnuclear world.
I first met Bujak one wintry morning in the late spring of 1980or of PN 35, if you use the postnuclear calendar that he sometimes favored.
When I looked at the symbol, I clairvoyantly perceived the void that I had seen before: the silent, dark, cold emptiness of a postnuclear world.