luminol
/ˈluːmɪnɒl/noun, verb
luminol is spelled L-U-M-I-N-O-L: 7 letters and 3 syllables. It appears about once in every 17 million words in written English, the 124,184th most frequent word form (wordfreq, 2021 data). As a noun, luminol means “The compound 5-amino-2,3-dihydro-1,4-phthalazinedione, which exhibits blue chemiluminescence when mixed with an appropriate oxidizing agent” (English Wiktionary, September 2026). The plural of luminol is luminols.
How many letters and syllables are in luminol?
| Letters | 7: L-U-M-I-N-O-L |
|---|---|
| Syllables | 3 (from its American pronunciation) |
| In writing | about once in every 17 million words; the 124,184th 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 and the CMU Pronouncing Dictionary; 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 luminol?
Luminol appears about once in every 17 million words in written English, the 124,184th 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 luminol?
- UK /ˈljuːmɪnɒl/
- US /ˈluːmɪnɒl/
Luminol has 3 syllables (counted from its American pronunciation in the CMU Pronouncing Dictionary).
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-Vealhurl-luminol.wav, Wikimedia Commons (author and licence on each file's page).
What rhymes with luminol?
No other word on PlainSpell ends in the same sounds as luminol (/umɪnɒl/).
Spelled with the same letters in another order: mullion.
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 luminol
- luminols plural, present, singular, he/she/it
- luminoling US, participle, present
- luminolling UK, participle, present
- luminoled US, participle, past
- luminolled UK, participle, past
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does luminol mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
The compound 5-amino-2,3-dihydro-1,4-phthalazinedione, which exhibits blue chemiluminescence when mixed with an appropriate oxidizing agent.
verb
- 1
To test or subject a sample or an individual to a luminol agent in order to locate traces of blood.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Luminol in Spanish, French, German and Portuguese
In the sense chemical that exhibits blue chemiluminescence:
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 luminol come from?
First use appears in 1934 in a paper by E. Huntress, L. Stanley, and A. Parker. The verbal form first appears c. 1997, although the exact date of its first appearance is uncertain.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).