fuzzy dark matter

noun

A type of dark matter with very low particle mass, with concomitant very large de Broglie wavelength (such as wavelength on the order of kiloparsecs), resulting in a population of overlapping waves, and concentrations of this dark matter modeled as fields and interference patterns, over astronomical and cosmological distances.

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Meanings

nounfuzzy dark matter (uncountable)
  1. uncountableastronomyA type of dark matter with very low particle mass, with concomitant very large de Broglie wavelength (such as wavelength on the order of kiloparsecs), resulting in a population of overlapping waves, and concentrations of this dark matter modeled as fields and interference patterns, over astronomical and cosmological distances.

Origin

From the lack of definition (fuzziness) due to the wave-like nature of fuzzy dark matter, unlike the particle-like of hot dark matter and cold dark matter.

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Cite this entry
APA

fuzzy dark matter. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/fuzzy%20dark%20matter

MLA

“fuzzy dark matter.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/fuzzy%20dark%20matter. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “fuzzy dark matter,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/fuzzy%20dark%20matter.

Source: fuzzy dark matter on Wiktionary, CC BY-SA 4.0.