follow Dictionary.com

Fiancé or fiancée? What's the difference?

electronic tube

noun

electron tube

noun
1.
an electronic device that consists, typically, of a sealed glass bulb containing two or more electrodes: used to generate, amplify, and rectify electric oscillations and alternating currents.
Also called electronic tube.
Compare gas tube, vacuum tube.
Origin of electron tube
1920-1925
1920-25
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
Cite This Source
British Dictionary definitions for electronic tube

electron tube

noun
1.
an electrical device, such as a valve, in which a flow of electrons between electrodes takes place Also called vacuum tube Sometimes shortened to tube
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source
electronic tube in Science
electron tube  
A sealed glass tube containing either a vacuum or a small amount of gas, in which electrons move from a negatively charged electrode, the cathode, to a positively charged one, the anode. The cathode is usually heated by an electric current to free the electrons. Other electrodes in the tube can vary the electric or magnetic fields in the tube to control the strength and direction of the moving electrons. Electron tubes are used to amplify signals, rectify AC currents, and produce x-rays, among other uses. They have been mostly replaced by transistors but are still used in television screens, computer monitors, and microwave technology. Also called valve. See also vacuum tube.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source

Word of the Day

Difficulty index for electronic tube

Few English speakers likely know this word

Word Value for electronic

14
18
Scrabble Words With Friends