Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A nitrogenous organic acid, C4H9N3O2, that is found in the muscle tissue of vertebrates mainly in the form of phosphocreatine and supplies energy for muscle contraction.
from The Century Dictionary.
- noun A neutral crystallizable organic substance (C4H9N3O2) obtained from muscular tissue. See extract under creatinine. Also spelled creatin, kreatin.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun biochemistry An
amino acid 2-(carbamimidoyl-methyl- amino)acetic acid which naturally occurs invertebrates and helps to supplyenergy tomuscle andnerve cells
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun an amino acid that does not occur in proteins but is found in the muscle tissue of vertebrates both in the free form and as phosphocreatine; supplies energy for muscle contraction
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
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Examples
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Players showed high levels of an enzyme called creatine kinase, which is a sign of vigorous exercise.
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Although muscle damage is usually associated with elevated levels of an enzyme called creatine phosphokinase, the CMAJ research shows that's not always the case.
Signs of the Times 2009
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While working in the fitness industry I read somewhere that creatine, which is meant to allow you to work out longer without fatigue or cramping, simply forces your body to absorb water.
Hangover Cures: Myth, Legend, Fact | Lifehacker Australia 2010
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Subbarao purified a molecule called ATP, the source of energy in all living beings ATP carries chemical “energy” in the cell, and another molecule called creatine, the energy carrier in muscle cells.
The Emperor of All Maladies Siddhartha Mukherjee 2010
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Subbarao purified a molecule called ATP, the source of energy in all living beings ATP carries chemical “energy” in the cell, and another molecule called creatine, the energy carrier in muscle cells.
The Emperor of All Maladies Siddhartha Mukherjee 2010
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While working in the fitness industry I read somewhere that creatine, which is meant to allow you to work out longer without fatigue or cramping, simply forces your body to absorb water.
Hangover Cures: Myth, Legend, Fact | Lifehacker Australia 2010
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Subbarao purified a molecule called ATP, the source of energy in all living beings ATP carries chemical “energy” in the cell, and another molecule called creatine, the energy carrier in muscle cells.
The Emperor of All Maladies Siddhartha Mukherjee 2010
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And he said his son had also taken creatine, which is a supplement used to stimulate muscle growth.
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They do, however, legally obtain, and often use in prodigious amounts, a product known as creatine phosphate, which doesn't build muscle, but is believed to boost athletic performance by enhancing cellular-energy production.
Toxic Strength 2007
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I find no evidence of liver disease, and I perform a simple blood test called creatine phosphokinase CPK, or CK.
DR. SANJIV CHOPRA’S LIVER BOOK Sanjiv Chopra 2001
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