# creatinine

> English word · Noun · IPA /kɹiːˈæ.təˌniːn/ · frequency rank #50,447

## Definitions
1. A heterocyclic amine, 2-amino-1-methyl-5H-imidazol-4-one, formed by the metabolism of creatine.

## Etymology
From creatine + -ine, from Ancient Greek κρέας (kréas, “meat”) (genitive κρέατος (kréatos)) + -ine.

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