/ Dictionary / Index P polyarticular: Meaning and Definition of Find definitions for: pol•y•ar•tic•u•lar Pronunciation: (pol"ē-är-tik'yu-lur), [key] — adj. Anat. pertaining to or affecting many joints. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. polyarthritis polyatomic Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language