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heliopause.

The boundary of heliosphere where the Sun's solar wind is stopped by the interstellar medium.

10 characters3 syllables approx.English language

Meaning & usage

noun/ˈhiː.li.ə.pɔːz/UK/ˈhɛ-/UK/ˈhi.li.əˌpɔz/US/ˈhi.li.əˌpɑz/cot-caught-merger
  1. The boundary of heliosphere where the Sun's solar wind is stopped by the interstellar medium.

Where this word comes from

From helio- + -pause.

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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.

Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.