noun
Meaning 1
A large region carved out of the interstellar medium by the combination of several supernova shells, leading to a lower density of gas and plasma within than without, larger than any single supernova could create.
Definition source: English Wiktionary via Wiktextract
Topics: astronomy, natural-sciences
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided