1. (noun) (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

• cbr
• cmb
• cosmic background radiation
• cosmic microwave background
• cosmic microwave background radiation

1. (noun) (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

• cosmic radiation

1. (noun) (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

• cosmogeny
• cosmogony
• cosmology