phosphagen

[ fos-fuh-juh n, -jen ]
/ ˈfɒs fə dʒən, -ˌdʒɛn /

noun Biochemistry.

a high-energy phosphoric ester that serves as a reservoir of phosphate-bond energy, as phosphocreatine in vertebrates and phosphoarginine in invertebrates.

Origin of phosphagen

First recorded in 1925–30; phospha(te) + -gen