ninhydrin
noun
ninhydrin is spelled N-I-N-H-Y-D-R-I-N: 9 letters. It appears about once in every 60 million words in written English, the 243,301st most frequent word form (wordfreq, 2021 data). As a noun, ninhydrin means “The aromatic compound 2,2-dihydroxyindane-1,3-dione which is used as a reagent to detect amines” (English Wiktionary, September 2026). The plural of ninhydrin is ninhydrins.
How many letters and syllables are in ninhydrin?
| Letters | 9: N-I-N-H-Y-D-R-I-N |
|---|---|
| In writing | about once in every 60 million words; the 243,301st 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 ninhydrin?
Ninhydrin appears about once in every 60 million words in written English, the 243,301st 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 ninhydrin
- ninhydrins plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does ninhydrin mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
The aromatic compound 2,2-dihydroxyindane-1,3-dione which is used as a reagent to detect amines
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Ninhydrin in Spanish, French, German and Portuguese
In the sense organic compound: 2,2-dihydroxyindane-1,3-dione:
| Language | Words |
|---|---|
| French | ninhydrine |
| German | Ninhydrin |
| Portuguese | ninidrina |
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.