cathode-ray tube

noun

: a vacuum tube in which a beam of electrons is projected on a phosphor-coated screen to produce a luminous spot at a point on the screen determined by the effect on the electron beam of a variable magnetic field within the tube

Examples of cathode-ray tube in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Streaming already accounts for 11% of the Sunday Night Football audience, and as the digital behemoths grow ever more powerful, the transition from the cathode-ray tube to the server farm is as inevitable as death and yet another miserable season for the Cleveland Browns. Anthony Crupi, Sportico.com, 12 Dec. 2025 When Amir is arrested on charges of attempting to create social unrest, Fatima embarks on a perilous journey with an old cathode-ray tube television and DVD player loaded onto a yak, determined to screen the film in remote villages. Naman Ramachandran, Variety, 1 Dec. 2025 Beyond its resemblance to a cathode-ray tube television set, it is said to have functional benefits over open fire pits and camp stoves. New Atlas, 31 Aug. 2025 His eponymous company manufactured cathode-ray tubes and in 1938 introduced one of the earliest electronic TV sets. IEEE Spectrum, 3 July 2025 But every early cathode-ray tube color television owed its screen’s red hue to europium, a rare earth element excavated and processed exclusively at the Mountain Pass Mine in San Bernardino County. Charlie Campbell, Time, 17 June 2025 The original peripherals worked on cathode-ray tube televisions, but here they have been updated. Asuka Kawanabe, WIRED, 21 Aug. 2024 Chunky cathode-ray tube televisions sat on outdated furniture. Christopher Muther, BostonGlobe.com, 24 Aug. 2023

Word History

First Known Use

1905, in the meaning defined above

Time Traveler
The first known use of cathode-ray tube was in 1905

Browse Nearby Words

Cite this Entry

“Cathode-ray tube.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cathode-ray%20tube. Accessed 19 Dec. 2025.

Kids Definition

cathode-ray tube

noun
: a vacuum tube in which a beam of electrons is projected upon a fluorescent screen and produces a glowing spot

Medical Definition

cathode-ray tube

noun
: a vacuum tube in which a beam of electrons is projected on a fluorescent screen to produce a luminous spot

More from Merriam-Webster on cathode-ray tube

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!