/ Dictionary / Index P periodontosis: Meaning and Definition of Find definitions for: per•i•o•don•to•sis Pronunciation: (per"ē-ō-don-tō'sis), [key] — n. Dentistry. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. periodontology period piece 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