carboxyl
/kɑː(ɹ)ˈbɒksɪl/noun
carboxyl is spelled C-A-R-B-O-X-Y-L: 8 letters. It appears about once in every 7 million words in written English, the 77,666th most frequent word form (wordfreq, 2021 data). As a noun, carboxyl means “A univalent functional group consisting of a carbonyl and a hydroxyl functional group (-CO.OH); characteristic of carboxylic acids” (English Wiktionary, September 2026). The plural of carboxyl is carboxyls.
How many letters and syllables are in carboxyl?
| Letters | 8: C-A-R-B-O-X-Y-L |
|---|---|
| In writing | about once in every 7 million words; the 77,666th 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 carboxyl?
Carboxyl appears about once in every 7 million words in written English, the 77,666th 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 carboxyl?
- /kɑː(ɹ)ˈbɒksɪl/
- /kɑː(ɹ)ˈbɒksaɪl/
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-Vealhurl-carboxyl.wav, LL-Q1860_(eng)-Tesco250-carboxyl.wav, Wikimedia Commons (author and licence on each file's page).
Forms of carboxyl
- carboxyls plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does carboxyl mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
A univalent functional group consisting of a carbonyl and a hydroxyl functional group (-CO.OH); characteristic of carboxylic acids.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Carboxyl in Spanish, French, German and Portuguese
In the sense carboxyl:
| Language | Words |
|---|---|
| French | carboxyle |
| German | Carboxy, Carboxygruppe |
| Portuguese | carboxila |
| Spanish | carboxilo |
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.