rochelle powder: meaning, definition, pronunciation and examples
Rare/TechnicalTechnical/Historical
Quick answer
What does “rochelle powder” mean?
A medicinal compound, specifically potassium sodium tartrate, used historically as a laxative or purgative.
Audio
Pronunciation
Definition
Meaning and Definition
A medicinal compound, specifically potassium sodium tartrate, used historically as a laxative or purgative.
In modern contexts, it can refer to the powdered form of Rochelle salt (potassium sodium tartrate tetrahydrate), used in certain technical, culinary (as a component of baking powder), or historical medical preparations.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. The term is equally obscure in both varieties.
Connotations
Connotes antiquated medicine, 18th–19th century pharmacy, or precise chemical composition.
Frequency
Extremely low frequency in both varieties. Likely slightly higher recognition in UK due to the historical name 'Rochelle' from La Rochelle, France, but this is negligible.
Grammar
How to Use “rochelle powder” in a Sentence
administer Rochelle powdercompound containing Rochelle powderRochelle powder is used for...Vocabulary
Collocations
Examples
Examples of “rochelle powder” in a Sentence
adjective
British English
- The Rochelle powder preparation was kept in a blue bottle.
- An effervescent Rochelle powder mixture.
American English
- The Rochelle powder compound is hygroscopic.
- A historic Rochelle powder formula.
Usage
Meaning in Context
Business
Virtually never used.
Academic
Used in historical papers on pharmacy, chemistry, or material science discussing crystal growth or old chemical processes.
Everyday
Not used in everyday conversation.
Technical
Used in specific contexts: historical medicine, chemistry (as a chiral resolving agent or in electroplating), culinary science (historical baking powder formulations).
Vocabulary
Synonyms of “rochelle powder”
Vocabulary
Antonyms of “rochelle powder”
Watch out
Common Mistakes When Using “rochelle powder”
- Misspelling as 'Roshelle powder' or 'Rochell powder'.
- Using it as a general term for any medicinal powder.
- Assuming it is a modern, common substance.
FAQ
Frequently Asked Questions
No, it is an obsolete remedy. Its primary modern uses are in technical fields like crystal growth or as a historical reference.
Rochelle salt (the compound in the powder) was a component of some early baking powders, acting as a source of tartaric acid to react with baking soda.
It is named after La Rochelle, France, where an apothecary named Pierre Seignette first prepared the compound (Rochelle salt) in the 17th century.
It is extremely unlikely to be found in a modern pharmacy. It might be available from specialist chemical suppliers or historical reproduction outlets.
A medicinal compound, specifically potassium sodium tartrate, used historically as a laxative or purgative.
Rochelle powder is usually technical/historical in register.
Rochelle powder: in British English it is pronounced /rəʊˈʃɛl ˌpaʊdə/, and in American English it is pronounced /roʊˈʃɛl ˌpaʊdər/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “None”
Learning
Memory Aids
Mnemonic
Think of a fancy (Rochelle) powder from an old-fashioned apothecary jar, used to 'get things moving.' Rochelle -> 'rouse' your system.
Conceptual Metaphor
MEDICINE IS A PURIFYING AGENT (historically, purging the body of ill humors).
Practice
Quiz
Rochelle powder is primarily composed of which compound?