: an electron tube evacuated to a high degree of vacuum
Examples of vacuum tube in a Sentence
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Transistors grew out of challenges to the limits of vacuum tubes.—Ron Schmelzer, Forbes.com, 5 Sep. 2025 Scientists in a lab in China have developed a remarkable vacuum tube that could help make a game-changer electronic warfare device, according to a report.—Prabhat Ranjan Mishra, Interesting Engineering, 15 Aug. 2025 Engineers in China are testing the use of low-vacuum tubes to remove this issue.—Theo Burman, MSNBC Newsweek, 12 Aug. 2025 From re-creating the sound of legendary recording studios to bringing the warm, analog sound of vacuum tubes and turntables into an age of lossless audio and Wi-Fi streaming, the world’s top car audio companies are turning it up to 11.—Mark Phelan, Freep.com, 27 July 2025 See All Example Sentences for vacuum tube
: an electron tube from which most of the air has been removed
Medical Definition
vacuum tube
noun
: an electronic device in which conduction by electrons takes place through a vacuum within a sealed glass or metal container and which has various uses based on the controlled flow of electrons
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