American Heritage® Dictionary of the English Language, Fourth Edition
- n. 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.
Century Dictionary and Cyclopedia
- n. A neutral crystallizable organic substance (C4H9N3O2) obtained from muscular tissue. See extract under creatinine. Also spelled creatin, kreatin.
- n. biochemistry An amino acid 2-(carbamimidoyl-methyl- amino)acetic acid which naturally occurs in vertebrates and helps to supply energy to muscle and nerve cells
- n. 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
- French créatine : from Greek kreas, kreat-, flesh. (American Heritage® Dictionary of the English Language, Fourth Edition)
“Players showed high levels of an enzyme called creatine kinase, which is a sign of vigorous exercise.”
“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.”
“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.”
“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.”
“And he said his son had also taken creatine, which is a supplement used to stimulate muscle growth.”
“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.”
“I find no evidence of liver disease, and I perform a simple blood test called creatine phosphokinase CPK, or CK.”
“Men should also be wary of using the much-touted natural supplement known as creatine.”
“They even confiscated his skipping rope amid concerns that overexertion was contributing to raised levels of a blood enzyme known as creatine kinase CK.”
“They are products of interaction between amino acids, which are the foundation of proteins, and the chemical creatine, which is stored in muscles.”
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