- an amino acid, C4H9N3O2, that is a constituent of the muscles of vertebrates and is phosphorylated to store energy used for muscular contraction.
Origin of creatine
1830–40; creat- (< Greek kreat-, stem of kréas) flesh + -ine2
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Examples from the Web for creatine
In vertebrates, the basis for the phosphoric acid is creatine, whereas invertebrates have arginine instead.
Creatine and creatinine also seem to lessen in amount, but of the extent of this change I am not as yet fully informed.Fat and Blood
S. Weir Mitchell
- an important metabolite involved in many biochemical reactions and present in many types of living cells
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
Word Origin and History for creatine
Online Etymology Dictionary, © 2010 Douglas Harper
- A nitrogenous organic acid that is found in the muscle tissue of vertebrates mainly in the form of phosphocreatine and supplies energy for muscle contraction.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
- 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.