cathode ray tube
noun/ˌkæθəʊd ˈreɪ tjuːb/
/ˌkæθəʊd ˈreɪ tuːb/
- a vacuum tube that was used in the past inside a television or computer screen, etc., and from which a stream of electrons produced images on the screen
- the invention of the cathode ray tube
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cathode ray tube