/ Dictionary / Index P polyarthritis: Meaning and Definition of Find definitions for: pol•y•ar•thri•tis Pronunciation: (pol"ē-är-thrī'tis), [key] — n. Pathol. arthritis occurring in more than one joint. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. polyarteritis polyarticular Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language