- quartation
[quartation 词源字典]
- "The addition of silver to a mixture of gold and silver until the proportions are about one to three, at which point it becomes possible to remove all the silver using nitric acid", Early 17th cent.; earliest use found in John Woodall (1570–1643), surgeon. From post-classical Latin quartation-, quartatio from classical Latin quartus fourth + -ātiō.[quartation etymology, quartation origin, 英语词源]