CMB

C3M3B3

A form of coastal motor boat — a small warship used in the Royal Navy during the First World War that carried torpedoes, mines or depth charges.

Similar
cosmic background radiationCBRcosmic microwave background radiationCMBRcosmic microwave background
Less commonScrabble 9
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Meanings

nounCMB (countable and uncountable, plural CMBs)

plural CMBs

  1. abbreviationcountableinitialismInitialism of coastal motor boat.
  2. abbreviationinitialismuncountableInitialism of cosmic microwave background.

Synonyms & antonyms

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

Similar
cosmic background radiationCBRcosmic microwave background radiationCMBRcosmic microwave background
Broader
cosmic radiation
Also see
cosmic background radiationcosmic microwave background

Synonym sets from Open English WordNet, CC BY 4.0.

Cite this entry
APA

CMB. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/CMB

MLA

“CMB.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/CMB. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “CMB,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/CMB.

Source: CMB on Wiktionary, CC BY-SA 4.0.