/ Dictionary / Index P P.P. factor: Meaning and Definition of Find definitions for: P.P. factor Pronunciation: [key] — Biochem. Biochem. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. P.P.F. PPH Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language