supershell

English

Etymology

From super- +‎ shell.

Pronunciation

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Noun

supershell (plural supershells)

1. (astronomy) 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.

Synonyms

• (astronomy): superbubble

Coordinate terms

(space plasmas):

• astrosphere
  • heliosphere
• circumgalactic medium (“CGM”)
• intergalactic cloud
• intergalactic medium (“IGM”)
• interplanetary medium (“IPM”)
• interstellar cloud
• interstellar medium (“ISM”)
• intracluster medium (“ICM”)
• nebula