fuzzy dark matter

Etymology
From the lack of definition due to the wave-like nature of fuzzy dark matter, unlike the particle-like of  and.

Noun

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