phosphocreatine[fäs′fō krē′ə tēn′, -tin]
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
Origin of phosphocreatinephospho- + creatine
An organic compound, C4H10N3O5P, found in muscle tissue and capable of storing and providing energy for muscular contraction. Also called creatine phosphate.