“+ noun
Etymology: International Scientific Vocabulary phosph- + creatine
: a compound C 4 H 8 N 3 O 2 PO 3 H 2 of creatine and phosphoric acid occurring especially in the muscles of vertebrates where its enzymatic hydrolysis releases phosphate and available energy for the work of muscular contraction — called also creatine phosphate ; see adenosine diphosphate