cupel
/'kju:pel/
Definition
- Noun:
- A small porous bowl made of bone ash: A cupel is a small, shallow, porous cup or dish, traditionally made from bone ash or a similar refractory material. Its primary use is in assaying, which is the process of analyzing ores or alloys to determine their composition, particularly to measure the amount of precious metals like gold or silver.
Usage
- The noun "cupel" refers specifically to the laboratory vessel used in metallurgy and assaying. It is a technical term.
- Example:
Advanced Usage
- "To cupel" (verb, rare/technical): The act of refining or assaying a metal using a cupel.
- The ore was cupelled to extract the pure gold.
Variants and Related Words
- Cupellation (noun): The process of assaying or refining metals in a cupel.
- Cupellation is an ancient technique for separating precious metals from lead.
Synonyms
- Test cup: A general term for a cup used in testing.
- Assay cup: Specifically indicates its use in assaying.
- Bone ash cup: Describes its common material.
Notes
- The word "cupel" is highly specialized and is primarily used in the contexts of metallurgy, chemistry, jewelry making, and mining. It is not common in everyday language.
Noun
-
a small porous bowl made of bone ash used in assaying to separate precious metals from e.g. lead
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