upsilon
/ˈ(j)uːpsɪˌlɒn/noun
upsilon is spelled U-P-S-I-L-O-N: 7 letters. It appears about once in every 9 million words in written English, the 89,388th most frequent word form (wordfreq, 2021 data). As a noun, upsilon means “The twentieth letter of Classical and Modern Greek; the twenty-second letter of Old and Ancient Greek” (English Wiktionary, September 2026). The plural of upsilon is upsilons or upsila.
How many letters and syllables are in upsilon?
| Letters | 7: U-P-S-I-L-O-N |
|---|---|
| In writing | about once in every 9 million words; the 89,388th most frequent word form |
| Wrong spellings searched | none measured in search |
| Same letters |
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); rhymes and same-letter words are computed by PlainSpell from its own word list.
How common is upsilon?
Upsilon appears about once in every 9 million words in written English, the 89,388th 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 upsilon?
- UK /ˈ(j)uːpsɪˌlɒn/
- UK /ˈ(j)ʊpsɪˌlɒn/
- UK /ˈʌpsɪˌlɒn/
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: En-us-upsilon.ogg, Wikimedia Commons (author and licence on each file's page).
What rhymes with upsilon?
No other word on PlainSpell ends in the same sounds as upsilon (/upsɪlɒn/).
Spelled with the same letters in another order: pulsion.
Computed by PlainSpell from the pronunciations in the English Wiktionary (dump of September 2, 2026): a rhyme shares every sound from the last stressed vowel to the end; ordered by written frequency (wordfreq 3.1).
Forms of upsilon
- upsilons plural
- upsila plural
- ypsilon
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does upsilon mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
The twentieth letter of Classical and Modern Greek; the twenty-second letter of Old and Ancient Greek.
- 2
An upsilon meson, or bottomonium.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Upsilon in Spanish, French, German and Portuguese
In the sense letter of the Greek alphabet:
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 upsilon come from?
From Ancient Greek ὖ ψιλόν (û psilón, “simple Υ”).
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).