/ Dictionary / Index P peristylium: Meaning and Definition of Find definitions for: per•i•sty•li•um Pronunciation: (per"u-stī'lē-um, -stil'ē-), [key] — pl. -sty•li•a a peristyle. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. peristyle peritectic 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