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Definition
Cathode-ray tube (CRT); the core component used to display images in older, thick televisions or monitors.
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How it's used
Refers specifically to the bulky, heavy glass vacuum tubes found in vintage televisions and computer monitors. Since the widespread adoption of liquid crystal displays and light emitting diodes, this term has become largely historical and is rarely used in modern contexts unless discussing retro gaming or antique electronics.
Measure word
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Old televisions used to have a cathode ray tube inside.
Do you know where they still sell cathode ray tubes?
Related words
Common mistake
Do not confuse this with modern screen technologies like 液晶顯示器, as the term is strictly reserved for the older, vacuum tube based hardware.
Grammar color guide
Noun
Verb
Adjective
Adverb
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Classifier
Particle
Connector
Grammar guides
- TonesCantonese has six tones, and the tones can change in certain grammatical contexts. Learn the six tones and the rules for tone change.
- Time and datesClock time, days of the week, months, and years. The patterns you need to make plans and talk about when things happen.
- Modal verbsHow to say can, will, may, should, must, and want. The core modal verbs of Cantonese and the differences that trip up beginners.



