vacuum tube


Definition of vacuum tube

: an electron tube evacuated to a high degree of vacuum

Examples of vacuum tube in a Sentence

Recent Examples on the Web Hyperloops are super-speed transit systems that move passengers seated within a capsule through a ground-level vacuum tube at speeds of up to 760 miles per hour, reports Anamaria Silic for Discover. Elizabeth Gamillo, Smithsonian Magazine, "Smithsonian’s ‘Futures’ Exhibition to Feature Virgin Hyperloop’s Record-Breaking Transportation Pod," 3 Mar. 2021 The Hyperloop is a new form of transportation similar to the high-speed maglev trains in Japan, South Korea, and China, but has one key difference — the trains travel in a near-complete vacuum tube. Tyler Van Dyke, Washington Examiner, "After first manned test ride, Virgin Hyperloop co-founder says pod transport is not a pipe dream," 16 Dec. 2020 It is designed to send a vehicle through a vacuum tube at speeds up to 600 miles per hour. Harold Maass, TheWeek, "The daily business briefing: November 9, 2020," 9 Nov. 2020 DevLoop test site in Las Vegas under the auspices of safety group Certifier, an official Independent Safety Assessor, which measure operational risks in rail systems, or in this case, a point-to-point vacuum tube. Richard Tribou,, "Virgin sends first test passengers on hyperloop," 9 Nov. 2020 Musk's hyperloop venture, the Boring Company, has focused on building tunnels under cities, for a lower speed service in Tesla vehicles that don't require a vacuum tube. Matt Mcfarland, CNN, "Virgin Hyperloop completes first test with actual passengers," 8 Nov. 2020 Surveying the shifts of the past three centuries, Dyson describes lost analog technologies, such as the vacuum tube and the heliograph communication system used in the Apache Wars. The New Yorker, "Briefly Noted," 19 Oct. 2020 The device has vacuum tube configurability and has options for single or dual-tube collection. al, "Auburn supports new program to create safer alternative for COVID-19 testing," 8 July 2020 That’s not an unfair overview, on paper, of George Dyson’s new tech history, Analogia, which turns on the moment when de Forest adds a bit of wire to Fleming’s vacuum tube and makes modern electronics possible, hooray. Wired Staff, Wired, "WIRED’s Ultimate Summer Reading List," 2 July 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'vacuum tube.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of vacuum tube

1859, in the meaning defined above

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Time Traveler for vacuum tube

Time Traveler

The first known use of vacuum tube was in 1859

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Statistics for vacuum tube

Last Updated

10 Mar 2021

Cite this Entry

“Vacuum tube.” Dictionary, Merriam-Webster, Accessed 6 May. 2021.

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More Definitions for vacuum tube

vacuum tube


English Language Learners Definition of vacuum tube

US : a glass tube that was used in the past in computers, televisions, etc., to control the flow of electricity

vacuum tube


Medical Definition of vacuum tube

: 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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