/ Dictionary / Index P periodontics: Meaning and Definition of Find definitions for: per•i•o•don•tics Pronunciation: (per"ē-u-don'tiks), [key] — n. (used with a sing. v.) the branch of dentistry dealing with the study and treatment of diseases of the periodontium. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: periodontics (Thesaurus) periodontal membrane periodontist Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language