CMB

Pronunciation (US):

(GB):

 Dictionary entry overview: What does CMB mean? 

• CMB (noun)
  The noun CMB has 1 sense:

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

  Familiarity information: CMB used as a noun is very rare.

 Dictionary entry details 

• CMB (noun)

Sense 1

Meaning:

(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

Classified under:

Nouns denoting natural phenomena

Synonyms:

CBR; CMB; CMBR; cosmic background radiation; cosmic microwave background; cosmic microwave background radiation

Hypernyms ("CMB" is a kind of...):

cosmic radiation (radiation coming from outside the solar system)

Domain category:

cosmogeny; cosmogony; cosmology (the branch of astrophysics that studies the origin and evolution and structure of the universe)

 Context examples 

In their paper, the EDGES team reported seeing a clear signal in the radio wave data, detecting a fall in CMB intensity when that process began.

(Astronomers detect ancient signal from first stars in universe, National Science Foundation)

That light interacted with free-floating hydrogen atoms, which began absorbing surrounding CMB photons.

(Astronomers detect ancient signal from first stars in universe, National Science Foundation)

A small dip in intensity, for example, should be apparent in CMB radio signals, but Earth's crowded radio-wave environment has hampered astronomers' search.

(Astronomers detect ancient signal from first stars in universe, National Science Foundation)

Because telescopes cannot see them, though, astronomers have been hunting for indirect evidence, such as a tell-tale change in the background electromagnetic radiation that permeates the universe, called the cosmic microwave background (CMB).

(Astronomers detect ancient signal from first stars in universe, National Science Foundation)