vacuum tube

noun

: an electron tube evacuated to a high degree of vacuum

Examples of vacuum tube in a Sentence

Recent Examples on the Web To measure this force within their vacuum tube, the researchers will suspend two samples made of different materials from a two-meter-tall, 1.50-meter-wide balance and induce the Casimir effect within one. Manon Bischoff, Scientific American, 1 May 2023 Making his first bid for political office, Garvey has proven to be as empty as a vacuum tube. Mark Z. Barabak, Los Angeles Times, 6 Mar. 2024 Blower/vacuum tubes: Many handheld mulchers are three-in-one options that come with attached tubes that will blow and/or vacuum leaves. Rachel Ahrnsen, Better Homes & Gardens, 28 Feb. 2024 Some stationary and walk-behind models also include vacuum tubes. Rachel Ahrnsen, Better Homes & Gardens, 28 Feb. 2024 See all Example Sentences for vacuum tube 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'vacuum tube.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1859, in the meaning defined above

Time Traveler
The first known use of vacuum tube was in 1859

Dictionary Entries Near vacuum tube

Cite this Entry

“Vacuum tube.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/vacuum%20tube. Accessed 14 Jul. 2024.

Kids Definition

vacuum tube

noun
: 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

More from Merriam-Webster on vacuum tube

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