/ Dictionary / Index P perionychia: Meaning and Definition of Find definitions for: per•i•o•nych•i•a Pronunciation: (per"ē-ō-nik'ē-u), [key] — n. Pathol. inflammation of the perionychium. per•i•o•nych•i•a Pronunciation: (per"ē-ō-nik'ē-u), [key] — n. pl. of Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Perioeci perionychium Related Content Daily Word Quiz: eccentric Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language