/ Dictionary / Index P periarteritis nodosa: Meaning and Definition of Find definitions for: periarteri'tis no•do'sa Pronunciation: (nō-dō'su), [key] — Pathol. Pathol. polyarteritis. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. periarteritis periastron Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language