pyrimidine
/paɪˈɹɪ.mɪˌdiːn/
"pyrimidine" is a 10-letter English headword indexed on PlainSpell.
The verdict
“pyrimidine” is uncommon English (frequency #94,154 among 46,516 “P” headwords), classed as a noun. The kind of spelling people second-guess.
- #94,154
- frequency rank, English
- 46,516
- “P” headwords
According to Wiktionary data (CC BY-SA, analyzed May 6, 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
| 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) |
Where “pyrimidine” sits in English frequency
Rare enough to double-check
pyrimidine is uncommon English at frequency #94,154 among 46,516 “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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Using “pyrimidine”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is P-Y-R-I-M-I-D-I-N-E - every other letter order is a misspelling in standard orthography.
- Say it as /paɪˈɹɪ.mɪˌdiːn/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- 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.