interstellar medium

1. 1.

   interstellar space including streams of protons moving from the stars

   Broaderinterstellar space

Questions about interstellar medium

What does interstellar medium mean?

interstellar medium means "interstellar space including streams of protons moving from the stars".

Is interstellar medium a common word?

interstellar medium is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.