'cosmic microwave background' definitions:

Definition of 'cosmic microwave background'

(from WordNet)
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 [syn: cosmic background radiation, CBR, cosmic microwave background radiation, CMBR, cosmic microwave background, CMB]

Words containing 'cosmic microwave background'