/ Dictionary / Index T terrestrial telescope: Meaning and Definition of Find definitions for: terres'trial tel'escope Pronunciation: [key] a refracting telescope having inverting lenses or an eyepiece that presents an erect image. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. terrestrial planet terret Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language