heliosphere
noun
heliosphere is spelled H-E-L-I-O-S-P-H-E-R-E: 11 letters. It appears about once in every 15 million words in written English, the 118,441st most frequent word form (wordfreq, 2021 data). As a noun, heliosphere means “The region of space where interstellar medium is blown away by solar wind; the boundary, heliopause, is often considered the edge of the Solar System” (English Wiktionary, September 2026). The plural of heliosphere is heliospheres.
How many letters and syllables are in heliosphere?
| Letters | 11: H-E-L-I-O-S-P-H-E-R-E |
|---|---|
| In writing | about once in every 15 million words; the 118,441st most frequent word form |
| Wrong spellings searched | none measured in search |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How common is heliosphere?
Heliosphere appears about once in every 15 million words in written English, the 118,441st most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How do you pronounce heliosphere?
- UK
- US
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-Rho9998-heliosphere.wav, LL-Q1860_(eng)-Wodencafe-heliosphere.wav, Wikimedia Commons (author and licence on each file's page).
Forms of heliosphere
- heliospheres plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does heliosphere mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
The region of space where interstellar medium is blown away by solar wind; the boundary, heliopause, is often considered the edge of the Solar System.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Heliosphere in Spanish, French, German and Portuguese
In the sense region of space:
| Language | Words |
|---|---|
| French | héliosphère |
| German | Heliosphäre |
| Portuguese | heliosfera |
| Spanish | heliosfera |
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.
Where does heliosphere come from?
From helio- + -sphere.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).