/ Dictionary / Index O orthoscope: Meaning and Definition of Find definitions for: or•tho•scope Pronunciation: (ôr'thu-skōp"), [key] — n. Ophthalm. (formerly) an instrument for examining the internal structures of the eye through a layer of water that neutralizes the refraction of the cornea. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: orthoscope (Thesaurus) orthorhombic orthoscopic Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language