noun. an organic compound of creatine and phosphoric acid; found in the muscles of vertebrates where its hydrolysis releases energy for muscular contraction.
1. Verb, base form Creatine converts to phosphocreatine which is stored in the muscles. 2. Noun, singular or mass Creatine is naturally made by the kidneys, pancreas and liver and is converted into two compounds known as phosphocreatine and creatine phosphate. 3. Adjective Your muscles can hold more phosphocreatine than your body produces, so creatine supplements can increase the amount of stored creatine.