eudiometer
Low (Technical/Scientific)Formal, Technical, Academic
Definition
Meaning
A graduated glass tube used to measure the change in volume of a gas mixture during a chemical reaction, especially to measure oxygen content in the air or another gas.
Any instrument for measuring the quantity of oxygen or other gases in a mixture, often through combustion or absorption methods. Historically significant in pneumatic chemistry.
Linguistics
Semantic Notes
The term is almost exclusively used in historical, scientific, or educational contexts related to chemistry. It implies a specific methodological approach to gas analysis.
Dialectal Variation
British vs American Usage
Differences
No significant difference in usage or meaning. Both varieties use the term within the same technical domains.
Connotations
Connotes 18th or 19th-century laboratory science, foundational experiments in gas chemistry.
Frequency
Extremely rare in general language; used only in specific historical or pedagogical contexts in both varieties.
Vocabulary
Collocations
Grammar
Valency Patterns
to measure [GAS] with a eudiometerto perform a eudiometric analysis of [SAMPLE]The [REACTION] was carried out in a eudiometer.Vocabulary
Synonyms
Strong
Neutral
Weak
Usage
Context Usage
Business
Not used.
Academic
Used in history of science, chemistry education, and historical texts describing early gas experiments.
Everyday
Virtually never used.
Technical
Used in precise descriptions of historical laboratory techniques and apparatus.
Examples
By Part of Speech
adjective
British English
- eudiometric measurements
- eudiometric apparatus
American English
- eudiometric analysis
- eudiometric data
Examples
By CEFR Level
- (Not applicable for this technical word at A2 level.)
- The scientist used a special tube called a eudiometer.
- In the laboratory, we measured the oxygen content using a graduated eudiometer.
- Priestley's eudiometric experiments were crucial for disproving the phlogiston theory and understanding combustion.
Learning
Memory Aids
Mnemonic
Imagine you 'UDI' (you die) without OXYgen, so a EUDIometer measures the 'O' (oxygen) to prevent that.
Conceptual Metaphor
TOOL FOR REVEALING INVISIBLE SUBSTANCES (making the composition of air visible/quantifiable).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not confuse with "эвдиометр" - it is a direct cognate with the same meaning.
Common Mistakes
- Misspelling as 'eudiameter' or 'udiometer'.
- Confusing it with a eudiometer (medical instrument for measuring hearing).
Practice
Quiz
What is the primary function of a eudiometer?
FAQ
Frequently Asked Questions
Rarely. It has been superseded by more precise and automated electronic gas analysers, but it may be used in educational demonstrations of historical methods.
From Greek 'eudia' meaning 'clear sky, fair weather' and '-meter' meaning 'measure'. It was originally thought to measure the 'goodness' or healthiness of air.
Yes, while classically associated with oxygen measurement, eudiometers can be used in reactions that involve other gases where a volume change occurs, such as hydrogen or carbon dioxide.
A eudiometer is typically a graduated glass tube open at one end and often used over water or mercury to trap and measure gas. A gas syringe is a sealed, plunger-operated device for collecting and measuring gas volumes directly.