vacuum tube

noun

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 For now, audio vacuum tube buyers are limited to the output of EHX and JJ, the latter of which—a far smaller operation than EHX—has a reported lead time of at least 18 months for new orders. David Meyer, Fortune, 30 Apr. 2022 To remove the vacuum tube, grip the large plastic lugs molded into the tube and twist it off. Alex Rennie, Popular Mechanics, 29 Apr. 2022 The printing press, the steam engine, antibiotics, the automobile, the vacuum tube, silicon chips, electricity, the birth-control pill, anesthesia, the refrigerator. Alan Lightman, The Atlantic, 15 Jan. 2022 At the center of the MA-1 was the Hughes Digitair, the first digital airborne computer, an 18-bit, one's-complement vacuum tube system with 2K words of core memory. Frank O’brien, Ars Technica, 4 Jan. 2022 The company based in Roanoke, Virginia, specializes in electronics for homeland security and says its next-generation binoculars infuse the lastest in connectivity with old vacuum tube technology found in black-and-white TVs. Washington Post, 24 May 2021 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, 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, 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, 9 Nov. 2020 See More

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.

First Known Use of vacuum tube

1859, in the meaning defined above

Learn More About vacuum tube

Time Traveler for vacuum tube

Time Traveler

The first known use of vacuum tube was in 1859

See more words from the same year

Dictionary Entries Near vacuum tube

vacuum tank

vacuum tube

vacuum-tube voltmeter

See More Nearby Entries 

Statistics for vacuum tube

Last Updated

9 May 2022

Cite this Entry

“Vacuum tube.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/vacuum%20tube. Accessed 28 May. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More Definitions for vacuum tube

vacuum tube

noun

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

More from Merriam-Webster on vacuum tube

Britannica.com: Encyclopedia article about vacuum tube

WORD OF THE DAY

Test Your Vocabulary

Eponyms: Words Named After People

True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ
Love words? Need even more definitions?

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