cyclin
"cyclin" is a 6-letter English headword indexed on PlainSpell.
The verdict
“cyclin” is uncommon English (frequency #58,627 among 43,570 “C” headwords), classed as a noun. The kind of spelling people second-guess.
- #58,627
- frequency rank, English
- 43,570
- “C” headwords
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Any of a group of proteins whose presence in a cell varies through its cycle, and that regulates this cycle by forming a complex with kinase
| Property | Value |
|---|---|
| Headword | cyclin |
| Language | English |
| Part of speech | Noun |
| Letters | 6 |
| Frequency rank | #58,627 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “cyclin” sits in English frequency
Rare enough to double-check
cyclin is uncommon English at frequency #58,627 among 43,570 “C” headwords, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "Any of a group of proteins whose presence in a cell varies through its cycle, and that regulates this cycle by forming a complex with kinase".
The misspelling generator found no plausible variants for cyclin, typically a sign the spelling maps closely to how the word sounds. We don't track a confusable pairing for this entry, a sign it's visually distinctive enough not to be mixed up with another word.
Etymologically, the entry records: From cycle + -in. The correct English form is cyclin, spelled C-Y-C-L-I-N.
Definition
- 1Any of a group of proteins whose presence in a cell varies through its cycle, and that regulates this cycle by forming a complex with kinase
Etymology
From cycle + -in.
Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.
Frequently Asked Questions
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Using “cyclin”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is C-Y-C-L-I-N - every other letter order is a misspelling in standard orthography.
- Browse more English words and confusable pairs in the same reference. English words
Other uncommon English words near this rank
Data Source
Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.