ALL meanings of cosmic background radiation
cos·mic back·ground ra·di·a·tion
C c - noun cosmic background radiation electromagnetic radiation coming from every direction in the universe, considered the remnant of the big bang and corresponding to the black-body radiation of 3 K, the temperature to which the universe has cooled. 1
- noun cosmic background radiation (astronomy) All the electromagnetic radiation entering the Earth from non-point sources in deep space. 0