opsin
noun
opsin is spelled O-P-S-I-N: 5 letters. It appears about once in every 26 million words in written English, the 155,937th most frequent word form (wordfreq, 2021 data). As a noun, opsin means “Any of a group of light-sensitive proteins in the retina” (English Wiktionary, September 2026). The plural of opsin is opsins.
How many letters and syllables are in opsin?
| Letters | 5: O-P-S-I-N |
|---|---|
| In writing | about once in every 26 million words; the 155,937th 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; 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 opsin?
Opsin appears about once in every 26 million words in written English, the 155,937th 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).
What rhymes with opsin?
No other word on PlainSpell ends in the same sounds as opsin.
Spelled with the same letters in another order: inspo.
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 opsin
- opsins plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does opsin mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
Any of a group of light-sensitive proteins in the retina.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Opsin in Spanish, French, German and Portuguese
In the sense Translations:
| Language | Words |
|---|---|
| French | opsine |
| German | Opsin |
| Portuguese | opsina |
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 opsin come from?
Shortened form of rhodopsin. From Ancient Greek ὄψις (ópsis, “sight”) + -in.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).