operon
"operon" is a 6-letter English headword indexed on PlainSpell.
The verdict
“operon” is uncommon English (frequency #84,584 among 1,431 “O” headwords), classed as a noun. The kind of spelling people second-guess.
- #84,584
- frequency rank, English
- 1,431
- “O” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A unit of genetic material that functions in a coordinated manner by means of an operator, a promoter, and structural genes that are transcribed together.
Corpus desk
Index EN-operon · operon · English
operon · rank #84,584 · 0 variants · 0 confusables
- FREQ-RARE #84,584
- LEN-LONG 6 letters
- VOW-3 3 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 1,431
- PHOTO-FINISH on't
Nearest frequency peer: on't (-2 rank slots)
Read with this headword: Spelling guide for this pattern
Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.
Long-tail ranks near “operon”
Sparse band: bars invert rank so rarer forms read shorter
- Odense
Odense
15,423 corpus weight
- omnipresence
omnipresence
15,421 corpus weight
- on't
on't
15,419 corpus weight
- operon
operon
15,417 corpus weight
- orchestrator
orchestrator
15,413 corpus weight
- osteopath
osteopath
15,411 corpus weight
What this shows Long-tail view: where “operon” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | operon |
| Language | English |
| Part of speech | Noun |
| Letters | 6 |
| Frequency rank | #84,584 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “operon” in English
Rare enough to double-check
operon is uncommon English at frequency #84,584 among 1,431 “O” headwords, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "A unit of genetic material that functions in a coordinated manner by means of an operator, a promoter, and structural genes that are transcribed together.".
operon has no tracked misspelling variants, typically a sign the spelling maps closely to how the word sounds. It is not paired with a close-neighbour confusable in our dataset, which usually means its spelling is distinct enough that readers don't reach for a similar-looking word instead.
Etymologically, the entry records: From operator + -on. The correct English form is operon, spelled O-P-E-R-O-N.
Definition
- 1A unit of genetic material that functions in a coordinated manner by means of an operator, a promoter, and structural genes that are transcribed together.
Etymology
From operator + -on.
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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Similar English words by spelling shape
Same letter count and similar misspelling depth for "operon", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 6 letters (nearest by frequency rank).