a compound of phosphoric acid and creatine found in vertebrate muscle
phosphocreatine in American English
(ˌfɑsfoʊˈkriəˌtin; ˌfɑsfoʊˈkriətɪn)
noun
a compound, C4H10N3O5P, 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