cathode ray tube
From Longman Dictionary of Contemporary EnglishRelated topics: Television & radio, Physics, Computerscathode ray tubeˌcathode ˈray tube noun [countable] AMTa piece of equipment used in televisions and computer monitors, in which electrons from the cathode produce an image on a screenExamples from the Corpuscathode ray tube• Indeed, much development work is required before cathode ray tube performance can be attained.