a compound, CHNOP, in vertebrate muscle, derived from creatine and used as a backup energy source because it reacts with ADP to replenish the ATP and creatine used in muscle contraction
See phosphocreatine in American Heritage Dictionary 4
(fŏsˌfō-krēˈə-tēnˌ) also phos·pho·cre·a·tin(-tĭn)
noun
An organic compound, C4H10N3O5P, found in muscle tissue and capable of storing and providing energy for muscular contraction. Also called creatine phosphate.