circumgalactic medium

English

Noun

circumgalactic medium (countable and uncountable, plural circumgalactic mediums or circumgalactic media)

1. (astronomy, plasma physics) The gas and plasma in the region surrounding a galaxy, beyond the galactic disc or ovoid, or interstellar medium (ISM), but within the galaxy's virial radius.

Synonyms

• CGM (abbreviation)

Coordinate terms

(space plasmas):

• astrosphere
  • heliosphere
• intergalactic cloud
• intergalactic medium (“IGM”)
• interplanetary medium (“IPM”)
• interstellar cloud
• interstellar medium (“ISM”)
• intracluster medium (“ICM”)
• nebula
• supershell

Derived terms

• CGM (abbreviation)

Related terms

• intergalactic medium
• interplanetary medium
• interstellar medium
• intracluster medium