interstellar medium

Fetched 2026-10-26 (cache).

Datamuse reports no synonyms or antonyms for this word.

Noun

1. {{lb|en|astronomy}} The [[matter]] that exists in the [[space]] between [[star system]]s in a [[galaxy]], including [[gas]], [[dust]]{{,}} and [[cosmic ray]]s.

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.