circumgalactic medium

== English == === Noun === circumgalactic medium (countable and uncountable, plural circumgalactic mediums or circumgalactic media) (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): ==== Derived terms ==== CGM (abbreviation) ==== Related terms ====