Search Result：cosmic microwave background
cosmic microwave background 
(TTS Sound)
(TTS Sound)Overview of noun cosmic_microwave_background
The noun cosmic microwave background has 1 sense
- cosmic background radiation, CBR, cosmic microwave background radiation, CMBR, cosmic microwave background, CMB -- ((cosmology) the cooled remnant of the hot big bang that fills the entire universe and can be observed today with an average temperature of about 2.725 kelvin)