cathode-ray tube: meaning, definition, pronunciation and examples
C2Technical, Historical
Quick answer
What does “cathode-ray tube” mean?
A sealed glass vacuum tube in which electrons are accelerated to a phosphorescent screen, used to produce a moving image in older televisions, computer monitors, and oscilloscopes.
Audio
Pronunciation
Definition
Meaning and Definition
A sealed glass vacuum tube in which electrons are accelerated to a phosphorescent screen, used to produce a moving image in older televisions, computer monitors, and oscilloscopes.
Any device, or the technology more generally, that uses an electron beam scanned across a phosphor screen to generate a visible image, historically central to display technology before the widespread adoption of flat screens.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Both use 'cathode-ray tube'. Spelling of related words may differ (e.g., 'colour' vs 'color' in 'colour CRT').
Connotations
Identical connotations of dated technology.
Frequency
Frequency of use is equally low in both varieties, limited to historical discussion, technical maintenance, or waste disposal contexts.
Grammar
How to Use “cathode-ray tube” in a Sentence
The [Device] contains/has/uses a cathode-ray tube.They replaced the cathode-ray tube with an LCD panel.Vocabulary
Collocations
Examples
Examples of “cathode-ray tube” in a Sentence
verb
British English
- The television cannot be cathode-ray tubed. (Not used as a verb)
American English
- You cannot cathode-ray tube a modern monitor. (Not used as a verb)
adverb
British English
- (Not used as an adverb)
American English
- (Not used as an adverb)
adjective
British English
- cathode-ray tube television
- cathode-ray tube technology
- cathode-ray tube era
American English
- cathode-ray tube monitor
- cathode-ray tube display
- cathode-ray tube recycling
Usage
Meaning in Context
Business
Used in contexts of electronic waste (e-waste) management, recycling logistics, and historical product specifications.
Academic
Used in physics, electronics, and media history to describe the fundamental technology of 20th-century display devices.
Everyday
Rarely used in casual conversation. May appear when discussing old electronics, clearing out attics, or visiting technology museums.
Technical
The standard term for the component in electronics repair, vintage computing, and engineering documentation.
Vocabulary
Synonyms of “cathode-ray tube”
Strong
Neutral
Weak
Vocabulary
Antonyms of “cathode-ray tube”
Watch out
Common Mistakes When Using “cathode-ray tube”
- Incorrectly hyphenating as 'cathode ray-tube'. The hyphens link 'cathode-ray' as a compound modifier for 'tube'.
- Using it as a plural noun without an 's' (e.g., 'cathode-ray tube' for plural). The correct plural is 'cathode-ray tubes'.
- Confusing it with 'vacuum tube' in general, which is a broader category.
FAQ
Frequently Asked Questions
CRT is the standard abbreviation for Cathode-Ray Tube.
Their use is extremely niche. They are largely obsolete in consumer products but may still be found in some specialised medical, military, or vintage computing equipment.
They contain a large, thick glass vacuum envelope to withstand atmospheric pressure, and may contain lead for radiation shielding, making them very heavy compared to modern flat screens.
No. Cathode-ray tubes contain toxic materials like lead and phosphors. They must be taken to a dedicated electronic waste (e-waste) recycling facility for safe processing.
A sealed glass vacuum tube in which electrons are accelerated to a phosphorescent screen, used to produce a moving image in older televisions, computer monitors, and oscilloscopes.
Cathode-ray tube is usually technical, historical in register.
Cathode-ray tube: in British English it is pronounced /ˈkæθ.əʊd ˌreɪ ˈtjuːb/, and in American English it is pronounced /ˈkæθ.oʊd ˌreɪ ˈtuːb/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “[No common idioms specific to this term]”
Learning
Memory Aids
Mnemonic
Imagine a CAT sitting on a RAY of light, looking down a long glass TUBE. The cat (CATHode) sends the ray down the tube.
Conceptual Metaphor
THE MIND IS A CONTAINER (for images/information) projected onto a screen.
Practice
Quiz
What is the primary reason cathode-ray tubes are rarely manufactured today?