/ Dictionary / Index P polytomy: Meaning and Definition of Find definitions for: po•lyt•o•my Pronunciation: (pu-lit'u-mē), [key] — pl. -mies. the act or process of dividing into more than three parts. the state or condition of being so divided. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. polythiazide polytonal Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language