An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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circumgalactic medium (CGM)
  مدیم ِ پیراکهکشانی  
madim-e pirâkahkešâni
Fr.: milieu circumgalactique  

The interface between a galaxy and the → intergalactic medium. The circumgalactic medium comprises gas located in the → halo of a galaxy extending out to the → virial radius.

See also: → circum-; → galactic.