cosmic microwave background

1 definition found

cosmic microwave background - WordNet (r) 2.1 (2005) :

  cosmic microwave background
      n 1: (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 [syn: cosmic background radiation
           , CBR, cosmic microwave background radiation
           , CMBR, cosmic microwave background, CMB]