/ Dictionary / Index H heliocentric parallax: Meaning and Definition of Find definitions for: he'liocen'tric par'allax Pronunciation: [key] — Astron. Astron. See under(def. 2). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. heliocentric Heliochrome Related Content Daily Word Quiz: ingenuity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language