: an electron tube evacuated to a high degree of vacuum
Examples of vacuum tube in a Sentence
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The aim of the project is to build a high-speed railway that carries 40-ft (12.2-m) shipping containers in a partial vacuum tube at speeds rivaling that of flight.—Joe Salas, New Atlas, 14 Mar. 2025 Thus, the most expensive components of the air defenses were not the radars or the weapons but the information system that would have been required to operate them, a capability that, in the era of vacuum tube computers, would have involved exorbitant costs.—Stephen Peter Rosen, Foreign Affairs, 14 Mar. 2025 In the 1940s and ’50s, room-sized mainframe computers relied on thousands of vacuum tubes, resisters, capacitors and more.—Gerui Wang, Forbes, 28 Feb. 2025 An old-fashioned triode vacuum tube does that using a voltage applied to its grid electrode.—IEEE Spectrum, 27 Mar. 2022 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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