/ Dictionary / Index P perinephrium: Meaning and Definition of Find definitions for: per•i•neph•ri•um Pronunciation: (per"u-nef'rē-um), [key] — pl. -neph•ri•a the capsule of connective tissue that envelops the kidney. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. perinde perineum Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language