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Thesaurus: quack

To utter a sound like the cry of a duck.

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  1. v. i. To utter a sound like the cry of a duck.
  2. v. i. To make vain and loud pretensions; to boast.
  3. v. i. To act the part of a quack, or pretender.
  4. n. The cry of the duck, or a sound in imitation of it; a hoarse, quacking noise.
  5. n. A boastful pretender to medical skill; an empiric; an ignorant practitioner.
  6. n. Hence, one who boastfully pretends to skill or knowledge of any kind not possessed; a charlatan.
  7. a. Pertaining to or characterized by, boasting and pretension; used by quacks; pretending to cure diseases; as, a quack medicine; a quack doctor.
  8. adj. medically unqualified
  9. n. an untrained person who pretends to be a physician and who dispenses medical advice
  10. n. the harsh sound of a duck
  11. v. utter quacking noises
  12. v. act as a medical quack or a charlatan