pyrimidine
/paɪˈɹɪ.mɪˌdiːn/
"pyrimidine" is a 10-letter English headword indexed on PlainSpell.
The verdict
“pyrimidine” is uncommon English (frequency #94,154 among 4,417 “P” headwords), classed as a noun. The kind of spelling people second-guess.
- #94,154
- frequency rank, English
- 4,417
- “P” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A diazine in which the two nitrogen atoms are in the meta- positions; it is the basis of three of the bases found in DNA and RNA: thymine, uracil and cytosine
Corpus desk
Index EN-pyrimidine · pyrimidine · English
pyrimidine · rank #94,154 · 0 variants · 0 confusables
- FREQ-RARE #94,154
- LEN-MEGA 10 letters
- VOW-5 5 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 4,417
- PHOTO-FINISH quadruped
Nearest frequency peer: quadruped (+1 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 “pyrimidine”
Sparse band: bars invert rank so rarer forms read shorter
- PTM
PTM
5,850 corpus weight
- puncheon
puncheon
5,849 corpus weight
- pyrimidine
pyrimidine
5,847 corpus weight
- quadruped
quadruped
5,846 corpus weight
- quarterdeck
quarterdeck
5,845 corpus weight
- quetzal
quetzal
5,844 corpus weight
What this shows Long-tail view: where “pyrimidine” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | pyrimidine |
| Language | English |
| Part of speech | Noun |
| IPA | /paɪˈɹɪ.mɪˌdiːn/ |
| Letters | 10 |
| Frequency rank | #94,154 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “pyrimidine” in English
Rare enough to double-check
pyrimidine is uncommon English at frequency #94,154 among 4,417 “P” headwords, classed as anoun, transcribed /paɪˈɹɪ.mɪˌdiːn/. Rarity is why readers land here mid-draft. Gloss: "A diazine in which the two nitrogen atoms are in the meta- positions; it is the basis of three of the bases found in DNA and RNA: thymine, uracil and cytosine".
No misspelling variants are generated for pyrimidine in our index, since its letter sequence doesn't invite the usual edit-distance slips. This headword has no recorded confusable partner, since nothing in our dataset looks or sounds close enough to cause mix-ups.
Etymologically, the entry records: First attested in 1885. From German Pyrimidin, from German Pyridin (“pyridine”), with the insertion of -mi- from amidine. The correct English form is pyrimidine, spelled P-Y-R-I-M-I-D-I-N-E.
Definition
- 1A diazine in which the two nitrogen atoms are in the meta- positions; it is the basis of three of the bases found in DNA and RNA: thymine, uracil and cytosine
Etymology
First attested in 1885. From German Pyrimidin, from German Pyridin (“pyridine”), with the insertion of -mi- from amidine.
This word in other languages
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 "pyrimidine", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 10 letters (nearest by frequency rank).