Meaning of creatinine

cre•at•i•nine

Pronunciation: (krē-at'n-ēn", -in), [key]
— n. Biochem.
  1. a crystalline end product of creatine metabolism, CHNO, occurring in urine, muscle, and blood.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.