/ Dictionary / Index A astronomical telescope: Meaning and Definition of Find definitions for: as'tronom'ical tel'escope Pronunciation: [key] a telescope having an objective with a long focal length and an eyepiece with a short focal length, usually used for observing celestial bodies. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. astronomical refraction astronomical triangle 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