periastron
/pɛɹɪˈæstɹən/noun
periastron is spelled P-E-R-I-A-S-T-R-O-N: 10 letters. It appears about once in every 76 million words in written English, the 275,970th most frequent word form (wordfreq, 2021 data). As a noun, periastron means “The point of an orbit in which a celestial body is at its closest to the star it is orbiting” (English Wiktionary, September 2026). The plural of periastron is periastrons or periastra.
How many letters and syllables are in periastron?
| Letters | 10: P-E-R-I-A-S-T-R-O-N |
|---|---|
| In writing | about once in every 76 million words; the 275,970th 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 periastron?
Periastron appears about once in every 76 million words in written English, the 275,970th 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 periastron?
- /pɛɹɪˈæstɹən/
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Forms of periastron
- periastrons plural
- periastra plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does periastron mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
The point of an orbit in which a celestial body is at its closest to the star it is orbiting.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Where does periastron come from?
From Ancient Greek περί (perí, “around”) + ἄστρον (ástron, “star”).
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).