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Book Glossary

quack

Dictionary definition · quack

noun

  1. an untrained person who pretends to be a physician and who dispenses medical advice
  2. the harsh sound of a duck

verb

  1. utter quacking noises"The ducks quacked"
  2. act as a medical quack or a charlatan

adjective

  1. medically unqualified"a quack doctor"

Source: Open English WordNet (CC BY 4.0).