# pyrimidine

> English word · Noun · IPA /paɪˈɹɪ.mɪˌdiːn/ · frequency rank #94,154

## Definitions
1. 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

## Etymology
First attested in 1885. From German Pyrimidin, from German Pyridin (“pyridine”), with the insertion of -mi- from amidine.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/pyrimidine