Definition from Wiktionary, the free dictionary
- (law, medicine, uncountable) The practice of fraudulent medicine, usually in order to make money or for ego gratification and power; health fraud.
- (countable) An instance of practicing fraudulent medicine.
- 1772: Edmund Burke, ed, The Annual Register
- His intentions were admirable, and his quackery had in view the public good; [...]
Related terms 
the practice of fraudulent medicine