noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   Initialism of cosmic microwave background radiation. abbreviation, alt-of, initialism, uncountable
2. 2
   (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 wordnet

Synonyms

All synonyms

cbrcmbcosmic background radiationcosmic background radiationcosmic microwave backgroundcosmic microwave background radiation

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.