melanopsin
noun
melanopsin is spelled M-E-L-A-N-O-P-S-I-N: 10 letters. It appears about once in every 31 million words in written English, the 169,822nd most frequent word form (wordfreq, 2021 data). As a noun, melanopsin means “A type of photopigment (an opsin) found in the retina; it is involved in the regulation of circadian rhythms” (English Wiktionary, September 2026). The plural of melanopsin is melanopsins.
How many letters and syllables are in melanopsin?
| Letters | 10: M-E-L-A-N-O-P-S-I-N |
|---|---|
| In writing | about once in every 31 million words; the 169,822nd 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 melanopsin?
Melanopsin appears about once in every 31 million words in written English, the 169,822nd 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 melanopsin
- melanopsins plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does melanopsin mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
A type of photopigment (an opsin) found in the retina; it is involved in the regulation of circadian rhythms
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Melanopsin in Spanish, French, German and Portuguese
In the sense Translations:
| Language | Words |
|---|---|
| French | mélanopsine |
| German | Melanopsin |
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 melanopsin come from?
From melano- + opsin.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).