/ Dictionary / Index O orthicon: Meaning and Definition of Find definitions for: or•thi•con Pronunciation: (ôr'thi-kon"), [key] — n. Television. a camera tube, more sensitive than the iconoscope, in which a beam of low-velocity electrons scans a photoemissive mosaic. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: orthicon (Thesaurus) orth- ortho Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language