/ Dictionary / Index P pyogenesis: Meaning and Definition of Find definitions for: py•o•gen•e•sis Pronunciation: (pī"u-jen'u-sis), [key] — n. Pathol. the generation of pus; the process of the formation of pus. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pyo- pyogenic Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language