[ kree-uh-teen, -tin ]

  1. an amino acid, C4H9N3O2, that is a constituent of the muscles of vertebrates and is phosphorylated to store energy used for muscular contraction.

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Origin of creatine

First recorded in 1830–40; creat- (from Greek kreat-, stem of kréas “flesh”) + -ine2

Words Nearby creatine Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

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British Dictionary definitions for creatine


creatin (ˈkriːətɪn)

/ (ˈkriːəˌtiːn, -tɪn) /

  1. an important metabolite involved in many biochemical reactions and present in many types of living cells

Origin of creatine

C19: creat- from Greek kreas flesh + -ine ²

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for creatine


[ krēə-tēn′, -tĭn ]

  1. A nitrogenous organic acid that is found in the muscle tissue of vertebrates, mainly combined with phosphorus, and that supplies energy for muscle contraction. Chemical formula: C4H9N3O2.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.