warm-hot intergalactic medium
noun1
Astronomy, Natural sciences A sparse warm-to-hot (10⁵ to 10⁷ K) plasma that cosmologists believe to exist in the spaces between galaxies and to contain 40–50% of the baryons in the universe at the current epoch.
- Related terms
- inter-galactic medium, intra-cluster medium, inter-stellar medium, inter-planetary medium