/ Dictionary / Index P pericenter: Meaning and Definition of Find definitions for: per•i•cen•ter Pronunciation: (per'u-sen"tur), [key] — n. Astron. the point at which a heavenly body orbiting around a primary other than the earth or sun is closest to the primary. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pericementum perichondrium Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language