/ Dictionary / Index P periodontology: Meaning and Definition of Find definitions for: per•i•o•don•tol•o•gy Pronunciation: (per"ē-ō-don-tol'u-jē), [key] — n. periodontics. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. periodontium periodontosis Related Content Daily Word Quiz: fresco Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language