Search
Select the dictionary language
cosmic microwave background
/kˈɒzmɪk mˈaɪkɹəʊwˌeɪv bˈakɡɹaʊnd/
CMBcosmic microwave background radiationCMBRCosmic microwave background
01
(cosmology) the faint glow of radiation spreading through the universe, believed to be residual radiation from the Big Bang
Examples
The cosmic microwave background is remarkably uniform across the sky.
