interstellar medium

in·ter·stel·lar me·di·um

I i

Definitions of interstellar medium words

noun interstellar medium the matter occurring between the stars of our Galaxy, largely in the spiral arms, and consisting mainly of huge clouds of ionized, neutral, or molecular hydrogen 0
noun interstellar medium (astronomy) The matter that exists in the space between star systems in a galaxy, including gas, dust, and cosmic rays. 0

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This term is known only to a narrow circle of people with rare knowledge. Only 7% of English native speakers know the meaning of this word.

According to our data most of word are more popular. This word is almost not used. It has a much more popular synonym.

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