/ Dictionary / Index P phosphagen: Meaning and Definition of Find definitions for: phos•pha•gen Pronunciation: (fos'fu-jun, -jen"), [key] — n. Biochem. a high-energy phosphoric ester that serves as a reservoir of phosphate-bond energy, as phosphocreatine in vertebrates and phosphoarginine in invertebrates. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. phosph- phosphamidon Related Content Daily Word Quiz: dissonant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language