English

Noun

interstellar medium

1. (astronomy) The matter that exists in the space between star systems in a galaxy, including gas, dust, and cosmic rays.

Synonyms

• ISM (abbreviation)

Derived terms

• ISM (abbreviation)

Related terms

• intracluster medium (ICM)
• intergalactic medium (IGM)
• interplanetary medium (IPM)
• extragalactic medium (EGM)
• extra-cluster medium (ECM)

• interstellar space

Translations

See also

• interplanetary space
• intergalactic space
• extragalactic space
• deep space
• near space
• outer space
• Earthspace
• space