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cosmic microwave background. In DICTIOUS you will not only get to know all the dictionary meanings for the word
cosmic microwave background, but we will also tell you about its etymology, its characteristics and you will know how to say
cosmic microwave background in singular and plural. Everything you need to know about the word
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English
Etymology
It was originally called the primeval fireball.
Pronunciation
Noun
cosmic microwave background (uncountable)
- (astronomy) Faint thermal radiation that pervades all space and is thought to be the remnants of the big bang, produced during the epoch of recombination.
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