cyanometer
Extremely rareTechnical, Historical
Definition
Meaning
An instrument for measuring the blueness of the sky.
A scientific device or scale, invented by Horace-Bénédict de Saussure in the 18th century, used to determine the intensity of the blue color of the sky, typically by comparing it against a graduated color scale.
Linguistics
Semantic Notes
The word is a historical scientific term, mostly obsolete and used only in very specific historical or meteorological contexts. It is not a measuring device in common use.
Dialectal Variation
British vs American Usage
Differences
No significant regional difference in meaning or usage, as the term is equally obscure in both varieties.
Connotations
Connotes 18th-19th century scientific inquiry, historical meteorology, and pre-modern atmospheric science.
Frequency
Virtually never encountered in everyday or general academic language.
Vocabulary
Collocations
Grammar
Valency Patterns
The [scientist] used a cyanometer to measure [the sky's blueness].Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “None”
Usage
Context Usage
Business
Not used.
Academic
Used only in historical or niche meteorological papers discussing pre-20th century instrumentation.
Everyday
Not used.
Technical
Used extremely rarely in the history of science or the history of meteorology.
Examples
By Part of Speech
adjective
British English
- The cyanometer readings were surprisingly consistent.
- It was a cyanometer measurement from 1789.
American English
- The cyanometer readings were surprisingly consistent.
- It was a cyanometer measurement from 1789.
Examples
By CEFR Level
- This old instrument is called a cyanometer.
- A cyanometer is a tool for measuring how blue the sky is.
- Historians of science often reference Saussure's cyanometer in studies of 18th-century meteorology.
- The cyanometer's 53-step scale, ranging from white to deepest blue, provided a surprisingly systematic, if aesthetically driven, quantification of atmospheric clarity.
Learning
Memory Aids
Mnemonic
Think: 'CYAN' (a blue-green colour) + 'METER' (a measuring device). A 'cyanometer' measures the cyan/blueness of the sky.
Conceptual Metaphor
SKY BLUENESS IS A MEASURABLE QUANTITY.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not confuse with 'цианометр' which would be a direct transliteration but is not a standard Russian word. The concept would be described as 'прибор для измерения синевы неба'.
Common Mistakes
- Misspelling as 'cyanmetre' or 'ciannometer'.
- Confusing it with a modern device like a spectrophotometer.
Practice
Quiz
What is the primary function of a cyanometer?
FAQ
Frequently Asked Questions
No, it is a historical instrument from the 18th and 19th centuries. Modern science uses spectrophotometers and other precise digital instruments for color measurement.
It was invented by the Swiss physicist, alpinist, and pioneer in meteorology, Horace-Bénédict de Saussure, in 1789.
You are unlikely to find one for sale, as they are museum pieces. Replicas or artistic interpretations might be made by specialty craftsmen.
No, it is an extremely rare and specialized term known mostly to historians of science and meteorology.