An Etymological Dictionary of Astronomy and Astrophysics
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A global ionizing radiation in the → interstellar medium provided by various sources all together.

→ interstellar; → radiation; → field.

1) The portion of an → electromagnetic field outside the → induction field where there is a power flow of both → magnetic and → electric components in a well-defined relationship.
2) → interstellar radiation field

→ radiation; → field.