/ Dictionary / Index P peridental membrane: Meaning and Definition of Find definitions for: per'iden'tal mem'brane Pronunciation: [key] — Dentistry. Dentistry. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. peridental periderm Related Content Daily Word Quiz: coincidence Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language