pyrrolidone
/ˈpɪɹəlɪˌdəʊn/noun
pyrrolidone is spelled P-Y-R-R-O-L-I-D-O-N-E. The wrong spelling people search most is pyrolidone: about 10 Bing searches a month in the United States (September 2025 to August 2026), about 3 in 10 of all searches for the word. Pyrrolidone is a noun meaning “any of a class of heterocyclic ketones derived from a pyrrolidine; especially 2-pyrrolidone, the simplest…”. The plural of pyrrolidone is pyrrolidones.
How many letters and syllables are in pyrrolidone?
| Letters | 11: P-Y-R-R-O-L-I-D-O-N-E |
|---|---|
| In writing | about once in every 51 million words; the 222,788th most frequent word form |
| Wrong spellings searched | 1; the most searched, pyrolidone, about 10 Bing searches a month (all of them) |
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); Bing searches in the United States: the average month from September 2025 to August 2026 (Microsoft Advertising keyword data through DataForSEO, read September 30, 2026).
How do you spell pyrrolidone?
Pyrrolidone is spelled P-Y-R-R-O-L-I-D-O-N-E. One wrong spelling is searched or written often enough to measure; together they are about 3 in 10 of the searches for pyrrolidone in either form.
Bing searches in the United States: the average month from September 2025 to August 2026 (Microsoft Advertising keyword data through DataForSEO, read September 30, 2026). Wrong spellings are taken from Wiktionary entries tagged "misspelling" and its obsolete or nonstandard forms, Wikipedia's Lists of common misspellings and the codespell dictionary, then measured. The proofreader's marks show the change that corrects each one.
How common is pyrrolidone?
Pyrrolidone appears about once in every 51 million words in written English, the 222,788th 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 pyrrolidone?
- /ˈpɪɹəlɪˌdəʊn/
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-Flame,_not_lame-pyrrolidone.wav, Wikimedia Commons (author and licence on each file's page).
Forms of pyrrolidone
- pyrrolidones plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does pyrrolidone mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
any of a class of heterocyclic ketones derived from a pyrrolidine; especially 2-pyrrolidone, the simplest γ-lactam
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Where does pyrrolidone come from?
From pyrrolidine + -one.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).