discharge tube: meaning, definition, pronunciation and examples
Low (C1/C2)Technical/Scientific
Quick answer
What does “discharge tube” mean?
A sealed glass or metal tube containing a gas at low pressure through which an electric current can be passed, causing the gas to glow (e.
Audio
Pronunciation
Definition
Meaning and Definition
A sealed glass or metal tube containing a gas at low pressure through which an electric current can be passed, causing the gas to glow (e.g., in neon signs or fluorescent lights).
Any tube-shaped vessel in which an electrical discharge is maintained through a gas or vapour, used in various scientific instruments, lighting, and display technologies.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Spelling follows local conventions (e.g., 'tube' not 'tub').
Connotations
Identical technical connotations in both varieties.
Frequency
Equally low-frequency in technical contexts in both regions.
Grammar
How to Use “discharge tube” in a Sentence
The [adjective] discharge tube [verb]A discharge tube filled with [gas][Process] occurs in a discharge tubeVocabulary
Collocations
Examples
Examples of “discharge tube” in a Sentence
adjective
British English
- The discharge-tube lighting gave the laboratory a peculiar glow.
- We studied discharge-tube phenomena.
American English
- The discharge-tube lighting gave the lab a peculiar glow.
- We studied discharge-tube characteristics.
Usage
Meaning in Context
Business
Rare. Might appear in procurement for laboratory or lighting equipment.
Academic
Common in physics, engineering, and chemistry textbooks and papers discussing electrical phenomena in gases.
Everyday
Virtually never used. A layperson would say 'neon light' or 'fluorescent light'.
Technical
Core term in electrical engineering, lighting technology, and experimental physics.
Vocabulary
Synonyms of “discharge tube”
Strong
Neutral
Weak
Vocabulary
Antonyms of “discharge tube”
Watch out
Common Mistakes When Using “discharge tube”
- Using 'discharge tube' to refer to a pipe for draining liquids (that's a 'drain pipe' or 'outlet pipe').
- Confusing it with a 'test tube'.
- Pronouncing 'discharge' with the stress on the second syllable (correct stress: DIS-charge).
FAQ
Frequently Asked Questions
A fluorescent light bulb contains a discharge tube as its core component. The tube is coated with phosphors that glow when excited by the ultraviolet light from the discharge.
Typically, no. Discharge tubes are sealed and contain a specific gas (like neon, argon, or mercury vapour) at low pressure. Air at atmospheric pressure would not allow the same kind of sustained glow discharge.
A CRT is a highly evacuated tube where a focused beam of electrons (cathode rays) strikes a phosphor screen. A standard discharge tube contains a gas where the current flows by ionising the gas, causing a diffuse glow. Some tubes, like Crookes tubes, blur this line.
Because it is the name for a component inside a finished product. People refer to the end product (neon sign, fluorescent lamp, plasma ball) rather than the specific tube where the discharge happens.
A sealed glass or metal tube containing a gas at low pressure through which an electric current can be passed, causing the gas to glow (e.
Discharge tube is usually technical/scientific in register.
Discharge tube: in British English it is pronounced /ˈdɪstʃɑːdʒ tjuːb/, and in American English it is pronounced /ˈdɪstʃɑːrdʒ tuːb/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “None”
Learning
Memory Aids
Mnemonic
Imagine a tube from which an electric DISCHARGE glows. The two words directly describe its function: a tube for discharging electricity through a gas.
Conceptual Metaphor
CONDUIT (for electrical energy), CONTAINER (for glowing gas/plasma).
Practice
Quiz
What is the primary function of a discharge tube?