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Definition of quack


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quack 2  audio  (kwk) KEY  

NOUN:
  1. An untrained person who pretends to be a physician and dispenses medical advice and treatment.
  2. A charlatan; a mountebank.
ADJECTIVE:
Relating to or characteristic of a quack: a quack cure.
intr.v.
quacked , quack·ing , quacks
To act as a medical quack or a charlatan.

ETYMOLOGY:
Short for quacksalver

OTHER FORMS:
quacker·y (Noun), quackish (Adjective), quackish·ly (Adverb)


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The American Heritage® Dictionary of the English Language, Fourth Edition.
Copyright © 2000 by Houghton Mifflin Company.
Published by the Houghton Mifflin Company. All rights reserved.
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