What does the word quackery mean?

Usage examples for quackery

  1. Thou treacherous medicine, reckoned pure, Thou quackery of the harassed heart, That kills what it pretends to cure, Life's mountebank thou art. – Poems Chiefly From Manuscript by John Clare
  2. But it is not easy to name an age that has cherished more delusions than ours, or been more superstitious, or more credulous, more eager to run after quackery. – The Complete Essays of C. D. Warner by Charles Dudley Warner
  3. In any case he was evidently a man who despised all quackery from the bottom of his heart. – Jezebel's Daughter by Wilkie Collins