/ Dictionary / Index P periglacial: Meaning and Definition of Find definitions for: per•i•gla•cial Pronunciation: (per"i-glā'shul), [key] — adj. Geol. occurring or operating adjacent to the margin of a glacier. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. perigee perigon Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language