hapten
noun
hapten is spelled H-A-P-T-E-N: 6 letters. It appears about once in every 72 million words in written English, the 269,040th most frequent word form (wordfreq, 2021 data). As a noun, hapten means “Any small molecule that can elicit an immune response only when attached to a large carrier such as a protein” (English Wiktionary, September 2026). The plural of hapten is haptens.
How many letters and syllables are in hapten?
| Letters | 6: H-A-P-T-E-N |
|---|---|
| In writing | about once in every 72 million words; the 269,040th 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 hapten?
Hapten appears about once in every 72 million words in written English, the 269,040th 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).
Forms of hapten
- haptens plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does hapten mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
Any small molecule that can elicit an immune response only when attached to a large carrier such as a protein.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Hapten in Spanish, French, German and Portuguese
In the sense Translations:
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 hapten come from?
Early 20th century: from German Hapten, from Ancient Greek ἅπτειν (háptein, “to fasten”).
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).