reaumur
C2/Extremely RareHistorical/Scientific/Technical
Definition
Meaning
A historical temperature scale where water freezes at 0° and boils at 80° under standard atmospheric pressure.
Pertaining to the scale or thermometer invented by René Antoine Ferchault de Réaumur; used historically in some European scientific and industrial contexts.
Linguistics
Semantic Notes
The term is almost exclusively used in historical contexts or when discussing the history of science and thermometry. It is not used in modern temperature measurement.
Dialectal Variation
British vs American Usage
Differences
No significant difference in usage, as the term is equally obsolete in both varieties. Might be slightly more familiar in British historical texts due to older scientific traditions.
Connotations
Archaic, historical, scientific precision of a bygone era.
Frequency
Virtually never encountered in contemporary language outside of specific historical or metrological discussions.
Vocabulary
Collocations
Grammar
Valency Patterns
[temperature] in degrees Réaumurcalibrated to the Réaumur scaleVocabulary
Synonyms
Neutral
Weak
Vocabulary
Antonyms
Usage
Context Usage
Business
Not used.
Academic
Used only in historical or history of science papers discussing 18th-19th century European science.
Everyday
Never used.
Technical
Extremely rare, only in metrology discussions about historical measurement systems.
Examples
By Part of Speech
adjective
British English
- The Réaumur thermometer was a common instrument in 18th-century French laboratories.
American English
- Early American scientists sometimes reported temperatures in Réaumur units.
Examples
By CEFR Level
- Before Celsius became standard, some European countries used the Réaumur scale.
- The manuscript recorded the experiment's temperature as 40° Réaumur, which equates to 50° Celsius.
Learning
Memory Aids
Mnemonic
Think: 'RAY of my URe (your) old thermometer' – a ray (Réa) pointing to an old, unused (obsolete) measurement you once used.
Conceptual Metaphor
A MEASUREMENT SYSTEM IS A LANGUAGE: The Réaumur scale is a dead language of temperature, no longer spoken but studied by historians.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not confuse with the modern Russian word for 'the world' or 'universe' (мир). The spelling and origin are completely different.
Common Mistakes
- Misspelling as 'Reamer', 'Remur', or 'Raumer'.
- Incorrectly capitalizing as 'reaumur'.
- Using it to refer to modern temperature.
Practice
Quiz
In which context would you most likely encounter the term 'Réaumur'?
FAQ
Frequently Asked Questions
No, it is completely obsolete and of historical interest only.
Multiply the Réaumur value by 1.25 (or 5/4). For example, 80°R = 100°C.
Réaumur used an 80-degree scale between the freezing and boiling points of water, likely for ease of subdivision.
It was used in parts of Europe, particularly France, Germany, and Russia, during the 18th and 19th centuries.