/ Dictionary / Index A astronomical refraction: Meaning and Definition of Find definitions for: astronom'ical refrac'tion Pronunciation: [key] — Astron. Astron. refraction (def. 3). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. astronomical frame of reference astronomical telescope Related Content Daily Word Quiz: supine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language