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cathode ray tubes

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cathode-ray tube

[kath-ohd-rey]
–noun
a vacuum tube generating a focused beam of electrons that can be deflected by electric fields, magnetic fields, or both. The terminus of the beam is visible as a spot or line of luminescence caused by its impinging on a sensitized screen at one end of the tube. Cathode-ray tubes are used to study the shapes of electric waves, to reproduce images in television receivers, to display alphanumeric and graphical information on computer monitors, as an indicator in radar sets, etc. Abbreviation: CRT

Origin:
1900–05
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Cultural Dictionary

cathode-ray tube (CRT)

A device that can produce an image on a screen with electrical impulses.

Note: The standard television screen is a sophisticated CRT, as are some of the screens on which computer output is displayed. Increasingly, flat-panel displays are replacing CRTs.
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: cathode–ray tube
Function: noun
: a vacuum tube in which a beam of electrons is projected on a fluorescent screen to produce a luminous spot
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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